Add CONTRIBUTING.md with guidelines for new contributors

CONTRIBUTING.md

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+# Contributing to Y24OpenSourceEngineering
+
+Thank you for your interest in contributing! This document explains how to get started.
+
+## Code of Conduct
+Be respectful and constructive when interacting with others.
+
+## How to Contribute
+1. **Fork** this repository and **clone** your fork.
+2. **Create a new branch** for your contribution.
+3. Make your changes or additions.
+4. Test your changes (if applicable).
+5. **Commit** using clear, descriptive messages.
+6. **Push** to your fork.
+7. **Open a Pull Request (PR)** to the `main` branch of this repo.
+
+## Branch naming convention
+Use descriptive names, such as:
+- `fix/issue-description`
+- `feat/new-feature`
+- `docs/update-readme`
+
+## Commit message style
+Use short, imperative messages:
+
+
+## Reporting bugs
+If you find an issue:
+- Check the existing [Issues](../../issues)
+- Open a new issue with a clear title and description.
+
+## Suggesting features
+Create an issue describing:
+- The problem it solves
+- Proposed approach
+- Possible alternatives
+
+## Submitting a Pull Request
+Before submitting:
+- Ensure your code is properly formatted.
+- Make sure it builds/tests successfully.
+- Reference related issue numbers in the PR description.
+
+Thank you for helping improve **Y24OpenSourceEngineering**! ❤️