Add comprehensive GitHub project documentation

.github/ISSUE_TEMPLATE/bug_report.yml

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+name: "🐛 Bug Report"
+description: "Report a reproducible problem"
+title: "[Bug]: "
+labels: ["bug"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to fill out this bug report! Please provide as much detail as possible.
+
+  - type: textarea
+    id: summary
+    attributes:
+      label: Summary
+      description: A clear and concise description of what the bug is.
+      placeholder: Describe the bug...
+    validations:
+      required: true
+
+  - type: textarea
+    id: steps-to-reproduce
+    attributes:
+      label: Steps to Reproduce
+      description: Steps to reproduce the behavior.
+      placeholder: |
+        1. Go to '...'
+        2. Click on '...'
+        3. Scroll down to '...'
+        4. See error
+    validations:
+      required: true
+
+  - type: textarea
+    id: expected-behavior
+    attributes:
+      label: Expected Behavior
+      description: A clear and concise description of what you expected to happen.
+      placeholder: What did you expect to happen?
+    validations:
+      required: true
+
+  - type: textarea
+    id: actual-behavior
+    attributes:
+      label: Actual Behavior
+      description: A clear and concise description of what actually happened.
+      placeholder: What actually happened?
+    validations:
+      required: true
+
+  - type: textarea
+    id: environment
+    attributes:
+      label: Environment
+      description: Please provide details about your environment.
+      placeholder: |
+        - OS: [e.g., Windows 11, macOS 14, Ubuntu 22.04]
+        - Browser: [e.g., Chrome 120, Firefox 121, Safari 17]
+        - Node.js version: [e.g., 18.19.0]
+        - npm version: [e.g., 10.2.0]
+    validations:
+      required: true
+
+  - type: textarea
+    id: logs
+    attributes:
+      label: Logs / Error Messages
+      description: If applicable, add any error logs or console output.
+      render: shell
+      placeholder: Paste any relevant log output here...
+    validations:
+      required: false
+
+  - type: textarea
+    id: screenshots
+    attributes:
+      label: Screenshots
+      description: If applicable, add screenshots to help explain your problem.
+      placeholder: Drag and drop images here...
+    validations:
+      required: false
+
+  - type: dropdown
+    id: severity
+    attributes:
+      label: Severity
+      description: How severe is this bug?
+      options:
+        - Low - Minor issue, cosmetic problem
+        - Medium - Affects functionality but has workaround
+        - High - Major functionality broken
+        - Critical - Application unusable or data loss
+    validations:
+      required: true
+
+  - type: textarea
+    id: additional-context
+    attributes:
+      label: Additional Context
+      description: Add any other context about the problem here.
+      placeholder: Any additional information...
+    validations:
+      required: false
+
+  - type: checkboxes
+    id: checklist
+    attributes:
+      label: Checklist
+      description: Please confirm the following
+      options:
+        - label: I have searched for existing issues to avoid duplicates
+          required: true
+        - label: I have provided all the requested information
+          required: true

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: false
+contact_links:
+  - name: 🛡 Security Vulnerabilities
+    url: https://github.com/H0NEYP0T-466/Matrix_Calculator/security/policy
+    about: Please report security vulnerabilities through our security policy.
+  - name: 💬 Questions & Discussion
+    url: https://github.com/H0NEYP0T-466/Matrix_Calculator/issues
+    about: Ask questions or start a discussion about Matrix_Calculator.

.github/ISSUE_TEMPLATE/feature_request.yml

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+name: "💡 Feature Request"
+description: "Propose an enhancement"
+title: "[Feature]: "
+labels: ["enhancement"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for suggesting a feature! Please fill out this template to help us understand your proposal.
+
+  - type: textarea
+    id: problem-statement
+    attributes:
+      label: Problem Statement
+      description: Is your feature request related to a problem? Please describe.
+      placeholder: A clear and concise description of what the problem is. Ex. "I'm always frustrated when..."
+    validations:
+      required: true
+
+  - type: textarea
+    id: proposed-solution
+    attributes:
+      label: Proposed Solution
+      description: Describe the solution you'd like.
+      placeholder: A clear and concise description of what you want to happen.
+    validations:
+      required: true
+
+  - type: textarea
+    id: alternatives
+    attributes:
+      label: Alternatives Considered
+      description: Describe any alternative solutions or features you've considered.
+      placeholder: A clear and concise description of any alternative solutions or features you've considered.
+    validations:
+      required: false
+
+  - type: textarea
+    id: scope
+    attributes:
+      label: Scope
+      description: What is in scope and out of scope for this feature?
+      placeholder: |
+        **In Scope:**
+        - ...
+
+        **Out of Scope:**
+        - ...
+    validations:
+      required: false
+
+  - type: textarea
+    id: risks
+    attributes:
+      label: Potential Risks
+      description: Are there any potential risks or downsides to this feature?
+      placeholder: Describe any potential risks, breaking changes, or concerns...
+    validations:
+      required: false
+
+  - type: dropdown
+    id: priority
+    attributes:
+      label: Priority
+      description: How important is this feature to you?
+      options:
+        - Nice to have
+        - Would be useful
+        - Important
+        - Critical for my use case
+    validations:
+      required: true
+
+  - type: textarea
+    id: additional-context
+    attributes:
+      label: Additional Context
+      description: Add any other context, mockups, or screenshots about the feature request here.
+      placeholder: Any additional information, screenshots, or mockups...
+    validations:
+      required: false
+
+  - type: checkboxes
+    id: checklist
+    attributes:
+      label: Checklist
+      description: Please confirm the following
+      options:
+        - label: I have searched for existing feature requests to avoid duplicates
+          required: true
+        - label: I am willing to help implement this feature (optional)
+          required: false

.github/pull_request_template.md

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+# 📝 Pull Request
+
+## 📋 Description
+
+<!-- Provide a brief description of your changes -->
+
+## 🔗 Related Issue
+
+<!-- Link to the issue this PR addresses (e.g., Fixes #123, Closes #456) -->
+
+Fixes #
+
+## 🏷 Type of Change
+
+<!-- Mark the appropriate option with an 'x' -->
+
+- [ ] `feat` – New feature
+- [ ] `fix` – Bug fix
+- [ ] `docs` – Documentation changes
+- [ ] `style` – Code style changes (formatting, etc.)
+- [ ] `refactor` – Code refactoring
+- [ ] `perf` – Performance improvements
+- [ ] `test` – Adding or updating tests
+- [ ] `build` – Build system or dependency changes
+- [ ] `ci` – CI/CD configuration changes
+- [ ] `chore` – Maintenance tasks
+- [ ] `revert` – Reverting previous changes
+
+## 📝 Summary of Changes
+
+<!-- Describe what changes you made and why -->
+
+- 
+
+## 💭 Motivation and Context
+
+<!-- Why is this change required? What problem does it solve? -->
+
+## 🧪 How Has This Been Tested?
+
+<!-- Describe how you tested your changes -->
+
+**Test Environment:**
+- OS: 
+- Browser: 
+- Node.js version: 
+
+**Test Steps:**
+1. 
+2. 
+3. 
+
+## 📸 Screenshots (if applicable)
+
+<!-- Add screenshots or GIFs to demonstrate UI changes -->
+
+## ✅ Checklist
+
+<!-- Mark completed items with an 'x' -->
+
+- [ ] My code follows the project's code style guidelines
+- [ ] I have performed a self-review of my code
+- [ ] I have commented my code, particularly in hard-to-understand areas
+- [ ] I have made corresponding changes to the documentation
+- [ ] My changes generate no new warnings
+- [ ] I have run `npm run lint` and fixed any issues
+- [ ] I have run `npm run build` successfully
+- [ ] New and existing tests pass locally
+- [ ] Any dependent changes have been merged and published
+
+## ⚠️ Breaking Changes
+
+<!-- If this PR introduces breaking changes, describe them here -->
+
+- [ ] This PR introduces breaking changes
+
+**Description of breaking changes:**
+
+## 📚 Additional Notes
+
+<!-- Add any additional context or notes for reviewers -->