Simplify the setup instructions for Windows in docs

[vkbo]

Summary:

Rewrite the Setup on Windows section of the documentation. This should be more precise and clearer for regular users. The old page had a bit too much irrelevant or outdated information.

Related Issue(s):

Reviewer's Checklist:

• The header of all files contain a reference to the repository license
• The overall test coverage is increased or remains the same as before
• All tests are passing
• All flake8 checks are passing and the style guide is followed
• Documentation (as docstrings) is complete and understandable
• Only files that have been actively changed are committed