Interactive website for useful Git commands

[rajprogrammerbd]

What does this PR do?

Add an interactive website link to learn useful commands using git in English.

For resources

Description

Why is this valuable (or not)?

How do we know it's free?

It's a link to a webpage.

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

It's an interactive resource

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!