Add Data Science and Python books

[Raghu0703]

Added new free programming resources:

• Python programming books
• Data Science learning materials

All resources are freely accessible and follow the repository guidelines.

[github-actions]

Linter failed, fix the error(s):

free-programming-books/books/free-programming-books-en.md
 8:1-10:65  warning  Incorrect number of blank lines between last section and next heading  blank-lines-1-0-2  remark-lint
14:1-16:94  warning  Alphabetical ordering: swap l.16 and l.15                              alphabetize-lists  remark-lint
14:1-16:94  warning  Incorrect number of blank lines between last section and next heading  blank-lines-1-0-2  remark-lint

free-programming-books/books/free-programming-python.md
1:1-3:261  warning  Alphabetical ordering: swap l.2 and l.1  alphabetize-lists            remark-lint
1:1-1:309  warning  Marker style should be `*`               unordered-list-marker-style  remark-lint
2:1-2:233  warning  Marker style should be `*`               unordered-list-marker-style  remark-lint
3:1-3:261  warning  Marker style should be `*`               unordered-list-marker-style  remark-lint