add isContourConvex, intersectConvexConvex

[rainyl]

• fix: isContourConvex support  #297
• add intersectConvexConvex

TODO:

• add test for intersectConvexConvex

[codecov-commenter]

⚠️ Please install the to ensure uploads and comments are reliably processed by Codecov.

Codecov Report

Attention: Patch coverage is 85.71429% with 2 lines in your changes missing coverage. Please review.

Project coverage is 92.02%. Comparing base (618d4c3) to head (4ffaef1).

Files with missing lines	Patch %	Lines
packages/dartcv/lib/src/imgproc/imgproc.dart	83.33%	1 Missing ⚠️
packages/dartcv/lib/src/imgproc/imgproc_async.dart	87.50%	1 Missing ⚠️

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@            Coverage Diff            @@
##           main     #299       +/-   ##
=========================================
+ Coverage      0   92.02%   +92.02%     
=========================================
  Files         0       49       +49     
  Lines         0     9143     +9143     
=========================================
+ Hits          0     8414     +8414     
- Misses        0      729      +729     

Flag	Coverage Δ
unittests	92.02% <85.71%> (?)

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

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.