added Angular books and cheatsheet

[pratap360]

What does this PR do?

Add resources

For resources

check out this repositories https://github.com/pratap360/Angular-Resources

Description

This 3 books are for beginners who wanted to level up the skill on Angular.

Why is this valuable (or not)?

this books and the cheat sheet is valuable because as a developer needs a resources at one place so it can be helpful.

How do we know it's really free?

it's free as it directly founded and able to download for free through search Engines.

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

• 3 Angular books list added
• Angular Cheat sheet added

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!

[github-actions[bot]]

Linter failed, fix the error(s):

free-programming-books/books/free-programming-books-langs.md
2585:1-2593:158  warning  Alphabetical ordering: swap l.2592 and l.2591  alphabetize-lists  remark-lint

free-programming-books/more/free-programming-cheatsheets.md
67:1-68:78  warning  Incorrect number of blank lines between last section and next heading  blank-lines-1-0-2  remark-lint

[github-actions[bot]]

Linter failed, fix the error(s):

free-programming-books/books/free-programming-books-langs.md
2585:1-2593:146  warning  Alphabetical ordering: swap l.2590 and l.2589  alphabetize-lists  remark-lint

[github-actions[bot]]

Linter failed, fix the error(s):

free-programming-books/books/free-programming-books-langs.md
2585:1-2593:146  warning  Alphabetical ordering: swap l.2589 and l.2588  alphabetize-lists  remark-lint

[eshellman]

This appears not to be an authorized distribution. Please see docs/CONTRIBUTING.md guidelines.