build: Migrate poetry to uv

[jacopo-massa]

Now "uv" is used insteaf of "poetry" to:

• build the docs
• build, verify and publish on pypi/testpypi
• manage dependencies
• maintain the devcontainer
• run examples as scripts

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.46%. Comparing base (b02954f) to head (006292e).
⚠️ Report is 6 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #18   +/-   ##
=======================================
  Coverage   95.46%   95.46%           
=======================================
  Files         375      375           
  Lines        7866     7866           
  Branches      844      844           
=======================================
  Hits         7509     7509           
  Misses        181      181           
  Partials      176      176           

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