Add CONTRIBUTING.md with first-time contributor guidelines

[dev-docs-github-app]

This PR adds a new CONTRIBUTING.md file to provide clear guidance for first-time contributors to the project. The new documentation includes:

• Step-by-step instructions for getting started with contributions
• Detailed workflow for making and submitting changes
• Clear process for submitting pull requests
• Guidelines for effective participation in the project

These guidelines will help new contributors:

• Understand how to properly fork and clone the repository
• Learn the correct branching and commit practices
• Follow the proper process for submitting pull requests
• Know how to effectively communicate and participate in the project

The addition of this documentation will make the project more accessible to new contributors and help maintain consistent contribution practices across the project.

[dev-docs-github-app]

This pull request was created by AI Agent. Please review the changes and provide feedback. Context used:

                    ```json
                    {

"docsToCreate": [
{
"filePath": "CONTRIBUTING.md",
"branch": "main"
}
],
"docsToUpdate": [],
"relevantCodeFiles": [],
"relevantCodeRepo": null,
"relevantDocsFiles": [
{
"filePath": "README.md",
"branch": "main"
}
]
}
```