[FEATURE]: Improve and Refine CONTRIBUTING.md for OrgExplorer

[Aditya30ag]

Feature and its Use Cases

The current CONTRIBUTING.md contains placeholder content and some generic sections that are not fully aligned with the OrgExplorer project setup.

This issue proposes refining the contributing guide to make it more project-specific and contributor-friendly. The document is not being finalized yet, but improved to better reflect the current project structure and stack.

Additional Context

No response

Code of Conduct

• I have joined the Discord server and will post updates there
• I have searched existing issues to avoid duplicates

[mansiverma897993]

Hi, I would like to work on improving the CONTRIBUTING.md file.
Could you please assign this issue to me?