Create CONTRIBUTING.md

Signed-off-by: Tutos Rive <108991712+tutosrive@users.noreply.github.com>

Author: tutosrive

CONTRIBUTING.md

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+# Contributing to Bridgex 🐍
+
+Thank you for considering contributing to **Bridgex**! We welcome your help to improve our graphical interface for file-to-Markdown conversion. Please follow these guidelines to help us maintain a high-quality project.
+
+## How to Contribute
+
+### 1. Reporting Issues
+- Use the _GitHub Issues_ tab to report bugs, request features, or ask questions.
+- Please provide as much detail as possible, including steps to reproduce if applicable.
+
+### 2. Suggesting Enhancements
+- Open an issue and describe your idea.
+- Explain how it benefits users of **Bridgex**.
+
+### 3. Submitting Pull Requests
+- Fork the repository and create your branch from `main`.
+- Follow the style and conventions used in the codebase (primarily _Python_, using _Pyside6_).
+- Write clear, concise commit messages.
+- Test your changes before submitting.
+- Reference related issues in your PR description.
+
+### 4. Coding Standards
+- Use Python 3.9+ compatible code.
+- Follow PEP8 guidelines for Python.
+- For GUI components, use Pyside6 and Qt best practices.
+- Add docstrings and comments where necessary.
+
+### 5. Documentation
+- Document new features or commands.
+
+### 6. Code Review
+- All PRs are subject to review. Be open to feedback and willing to make improvements.
+
+## Code of Conduct
+
+Please be respectful and constructive in all interactions. Discrimination, harassment, or inappropriate behavior will not be tolerated.
+
+## License
+
+By contributing, you agree that your work will be released under the project's license (**MIT**).