[Reconstitution] Improve reconstitution

[felixdittrich92]

This PR:

• Improve synthesize quality
• Allow also to render polygons but warn because to large rotations can't be rendered correctly yet
• Extend corresponding tests

Still not perfect but looks much better as before :)

Any feedback is welcome 🤗

Old: (Lots of overlapping / clipping)

New:

New without line:

[codecov]

Codecov Report

Attention: Patch coverage is 92.98246% with 4 lines in your changes missing coverage. Please review.

Project coverage is 96.54%. Comparing base (59f1c30) to head (6867d98).
Report is 5 commits behind head on main.

Files with missing lines	Patch %	Lines
doctr/utils/reconstitution.py	92.85%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1750      +/-   ##
==========================================
+ Coverage   96.46%   96.54%   +0.07%     
==========================================
  Files         164      164              
  Lines        7869     7895      +26     
==========================================
+ Hits         7591     7622      +31     
+ Misses        278      273       -5     

Flag	Coverage Δ
unittests	96.54% <92.98%> (+0.07%)	⬆️

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[felixdittrich92]

Closes: #1692

[felixdittrich92]

@odulcy-mindee Any further changes in mind or fine ? :)

PS: Please check your Slack 😅

[felixdittrich92]

@odulcy-mindee ?