doc: contribution guidelines 📓 fixes issue #439

[leftkats]

PR Title
Add CONTRIBUTING.md file with contribution guidelines for Python scripts

Summary
Added a clear and simple CONTRIBUTING.md file to help guide contributors on how to add Python scripts to the repository, including steps for discussion, contribution, PR creation, and a link to the code of conduct.

Description
The changes are as follows:

• Added a new CONTRIBUTING.md file with contribution guidelines.
• Included instructions for first-time contributors and a link to a helpful external resource.
• Referenced the existing code of conduct to ensure a welcoming community environment.

Checks

In the repository

• Made no changes that degrade the functioning of the repository
• Gave each commit a better title (unlike generic "updated README.md")

In the PR

• Followed the format of the pull_request_template
• Made the Pull Request in a small level (for the creator’s welfare)
• Tested the changes you made

Thank You,
leftkats

Resolves #439

[DhanushNehru]

Please make the file name in capital letters.

Also change all the places where CONTRIBUTIONS.md is mentioned. Also make sure to delete the old one.

[DhanushNehru]

You can squash it to a single commit @leftkats

[leftkats]

squashed into a single commit @DhanushNehru feel free to merge, thank you !