Enhance README: clearer structure, contribution info, and app overview table

[devilsrage]

What does this PR do?
This PR improves the README.md for the Keploy Python Sample Applications repository by:

• Reorganizing the content for better readability and structure
• Adding a clear overview table of the sample applications (framework, database, description)
• Providing clearer contribution guidelines and community support links
• Highlighting where to submit issues (main Keploy repository)
• Introducing a Getting Started section to guide users to individual app instructions
• Ensuring consistent tone and formatting across the README

Why is this needed?

• The previous README was functional but could benefit from a clearer structure and more engaging tone
• Makes it easier for newcomers and contributors to understand the repo’s purpose and how to get involved
• Aligns with Keploy’s documentation quality goals for the API Fellowship program

Checklist

• IMPROVED README STRUCTURE
• ADDED APP OVERVIEW TABLE
• ADDED CONTRIBUTION AND SUPPORT LINKS
• VERIFIED LINKS ARE CORRECT

Related
Keploy main issue tracker

[pratik-mahalle]

Hey @devilsrage, Thank you for raising the pr. Our team will review it soon

[pratik-mahalle]

There was no need to add the code of conduct here

[pratik-mahalle]

I don't think the changes you have made are relevant