Added CODE_OF_CONDUCT.md, PULL_REQUEST_TEMPLATE.md and ISSUE_TEMPLATE

Author: mr-fatalyst

.github/CODE_OF_CONDUCT.md

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+# Code of Conduct
+
+FastOpenAPI is built with one goal: to make life easier for developers working with different web frameworks.  
+It's an open tool for open people.
+
+## What We Expect
+
+- Be respectful and constructive. We're all here to make things better.
+- Help others if you can. Ask for help if you need it.
+- Feedback is welcome — especially if it makes the tool easier to use.
+
+## What We Don’t Accept
+
+- Disrespectful or aggressive behavior
+- Personal attacks or gatekeeping
+- Any form of harassment
+
+## Need to Talk?
+
+If you run into a problem with another contributor or feel something’s off, you can open a **GitHub security advisory** or reach out privately via the repo contacts. We’ll handle it respectfully and discreetly.
+
+---
+
+Let’s keep FastOpenAPI useful, respectful, and open for everyone who wants to improve it.
+
+---

CONTRIBUTING.md renamed to .github/CONTRIBUTING.md

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+name: Bug Report
+description: File a bug report to help us improve FastOpenAPI
+title: "[Bug] "
+labels: [bug]
+assignees: []
+
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to report a bug! Please fill out this form so we can better understand the issue.
+
+  - type: input
+    id: environment
+    attributes:
+      label: Environment
+      description: Describe your environment (Python version, OS, FastOpenAPI version, framework used, etc.)
+      placeholder: Python 3.11, FastOpenAPI 0.5.0, Ubuntu 22.04, Flask 2.2
+    validations:
+      required: true
+
+  - type: textarea
+    id: description
+    attributes:
+      label: Bug Description
+      description: What happened and what did you expect to happen?
+      placeholder: A clear and concise description of the problem.
+    validations:
+      required: true
+
+  - type: textarea
+    id: steps
+    attributes:
+      label: Steps to Reproduce
+      description: How can we reproduce the bug?
+      placeholder: |
+        1. Go to '...'
+        2. Use this code snippet '...'
+        3. See the error message '...'
+    validations:
+      required: true
+
+  - type: textarea
+    id: logs
+    attributes:
+      label: Logs or Tracebacks
+      description: Paste relevant logs or tracebacks here.
+      render: shell
+
+  - type: input
+    id: contact
+    attributes:
+      label: Contact
+      description: Optional – how can we reach you if we need more info?

.github/ISSUE_TEMPLATE/bug_report.yml

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+name: Feature Request
+description: Suggest a new feature or enhancement
+title: "[Feature] "
+labels: [enhancement]
+assignees: []
+
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Have an idea for FastOpenAPI? We'd love to hear it!
+
+  - type: input
+    id: motivation
+    attributes:
+      label: What problem are you trying to solve?
+      description: Explain the use case or need behind this feature.
+    validations:
+      required: true
+
+  - type: textarea
+    id: proposal
+    attributes:
+      label: Proposed Solution
+      description: Describe the feature you’d like to see and how it might work.
+    validations:
+      required: true
+
+  - type: textarea
+    id: alternatives
+    attributes:
+      label: Alternatives Considered
+      description: Have you tried any alternative approaches or workarounds?
+
+  - type: input
+    id: contact
+    attributes:
+      label: Contact
+      description: Optional – how can we reach you if we need more info?

.github/ISSUE_TEMPLATE/feature_request.yml

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+# Pull Request
+
+Thanks for contributing to FastOpenAPI!  
+Before submitting, please make sure you've read [CONTRIBUTING.md](../CONTRIBUTING.md).
+
+---
+
+## What’s Included?
+
+- [ ] New feature
+- [ ] Bug fix
+- [ ] Documentation improvement
+- [ ] Refactor / internal change
+
+**Describe your changes:**
+
+> Concise and clear: what did you change, why, and which parts/frameworks are affected?
+
+---
+
+## How Was It Tested?
+
+> Describe how you tested the changes.  
+> Were new tests added? Are examples working?
+
+---
+
+## Anything Else?
+
+> Optional:
+> - Any TODOs or follow-up items?
+> - Known limitations or trade-offs?
+> - Anything you'd like reviewers to focus on?
+
+---