Add Django 4.0 official documentation

[suravshrestha]

What does this PR do?

Add resources

For resources

Description

Quick reference guide to Django provided by codemy.com in PDF version and official documentation on Django 4.0 in PDF version

Why is this valuable (or not)?

The cheat sheet provides to quick start to create and run a Django project

How do we know it's really free?

The cheat sheet provided by the author at his website codemy.com at https://codemy.com/books/django-quick-reference-guide.pdf The documentation is provided by the official team.

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

The first commit is includes a cheat sheet The second commit link includes a documentation

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!