Sync 2.x to main

[rainyl]

• bump dependencies
• add UMat
• [features2d] add more functions/constructions
• add custom loggers, support user-defined logger callback
• add cv.freetype module
• bump dartcv to 1.1.8
• update readme

fixes: #173 #384

[codecov-commenter]

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Codecov Report

❌ Patch coverage is 89.01624% with 115 lines in your changes missing coverage. Please review.
✅ Project coverage is 92.87%. Comparing base (f05d512) to head (b02602f).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
packages/dartcv/lib/src/core/umat.dart	79.01%	34 Missing ⚠️
packages/dartcv/lib/src/core/core.dart	60.78%	20 Missing ⚠️
packages/dartcv/lib/src/features2d/features2d.dart	95.34%	16 Missing ⚠️
...ges/dartcv/lib/src/features2d/features2d_enum.dart	51.51%	16 Missing ⚠️
packages/dartcv/lib/src/contrib/freetype.dart	84.41%	12 Missing ⚠️
...es/dartcv/lib/src/features2d/features2d_async.dart	91.37%	10 Missing ⚠️
...ges/dartcv/lib/src/features2d/features2d_base.dart	97.30%	7 Missing ⚠️
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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #386      +/-   ##
==========================================
- Coverage   93.41%   92.87%   -0.54%     
==========================================
  Files          51       55       +4     
  Lines       10660    11333     +673     
==========================================
+ Hits         9958    10526     +568     
- Misses        702      807     +105     

Flag	Coverage Δ
unittests	92.87% <89.01%> (-0.54%)	⬇️

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