Added Online Playground for C and Python

[awalrujaa]

What does this PR do?

Add resource(s)

For resources

Description

Add Online C Playground

This commit introduces an Online Python Playground and C Playground that allows users to write, edit, and run code directly in their browsers. This feature supports real-time coding and debugging, enhancing learning and development flexibility.

Why is this valuable (or not)?

This allows users to write, edit, and run code directly in their browsers without the need of downloading or installation of other software. This saves time and helps you focus on learning.

How do we know it's really free?

Anybody can access it. It is an absolutely free resource.

For book lists, is it a book? For course lists, is it a course? etc.

Checklist:

• [x] Read our contributing guidelines.
• [x] Search for duplicates.
• [x] Include author(s) and platform where appropriate.
• [x] Put lists in alphabetical order, correct spacing.
• [x] Add needed indications (PDF, access notes, under construction).
• [x] Used an informative name for this pull request.

Follow-up

• Check the status of GitHub Actions and resolve any reported warnings!

[eshellman]

please refrain from duplicate PRs