[CI] Check that each push or PR doesn't break release process

[jeandet]

While releasing 0.10.0, I discovered that I broke title consistency between README and HISTORY which are used for generating PyPi landing page.
To avoid this, I propose to generate python packages on each push and PR and just run twine check to ensure everything still works.

[codecov]

Codecov Report

Merging #34 (5bc35fe) into main (038c88a) will decrease coverage by 1.56%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main      #34      +/-   ##
==========================================
- Coverage   87.10%   85.54%   -1.57%     
==========================================
  Files          31       31              
  Lines        1474     1474              
  Branches      248      248              
==========================================
- Hits         1284     1261      -23     
- Misses        127      150      +23     
  Partials       63       63              

Flag	Coverage Δ
unittests	85.54% <ø> (-1.57%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
speasy/webservices/amda/_impl.py	72.04% <0.00%> (-13.98%)	⬇️
speasy/webservices/amda/rest_client.py	75.55% <0.00%> (-6.67%)	⬇️
speasy/core/__init__.py	95.00% <0.00%> (-2.50%)	⬇️
speasy/webservices/amda/ws.py	86.39% <0.00%> (-2.05%)	⬇️

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