Add ruff, add full typing

[wRAR]

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 91.30435% with 4 lines in your changes missing coverage. Please review.

Project coverage is 94.23%. Comparing base (ff7e7c4) to head (b34cf5d).

Files with missing lines	Patch %	Lines
html_text/html_text.py	90.90%	3 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           master      #17       +/-   ##
===========================================
+ Coverage   81.55%   94.23%   +12.67%     
===========================================
  Files           2        2               
  Lines         103      104        +1     
  Branches       22       19        -3     
===========================================
+ Hits           84       98       +14     
+ Misses         17        4       -13     
  Partials        2        2               

Files with missing lines	Coverage Δ
html_text/__init__.py	100.00% <100.00%> (ø)
html_text/html_text.py	94.11% <90.90%> (+12.92%)	⬆️