Include UV instructions and review installation

[vcaldas]

Content of this PR:

• Added an option to use UV
• Clarified text
• Add reference to the contributing page

Note: On the instructions related to topic branches, the options are bug or feature. I created this pr with the topic docreview as it is representing better the content of the PR.

Thanks for the reviews, @bug-or-feature

[kobi4000]

have you tried uv pip install -r rquirements.txt.

[vcaldas]

Yes.
Mind that these are just extra instructions and from my tests should be backwards compatible.

But happy to hear if you found issues while following what I wrote in the PR.

[kobi4000]

I encountered an issue where pip complained when I created a virtual environment with uv and tried running pip directly, displaying a message along the lines of: "This environment is externally managed..."