[Imgproc] Add more 2f version APIs for high-precision usage (#364)

* bump ffigen to 19.0.0, regenerate ffigen

* add more 2f version functions

* add more tests for 2f version APIs, remove `convexityDefects2f` since opencv does not support; breaking change: optional args `hierarchy` of drawContours now change to VecVec4i type.

Author: rainyl

packages/dartcv/lib/src/g/calib3d.g.dart

@@ -2026,7 +2026,8 @@ enum VideoAccelerationType {
         2 => VIDEO_ACCELERATION_D3D11,
         3 => VIDEO_ACCELERATION_VAAPI,
         4 => VIDEO_ACCELERATION_MFX,
-        _ => throw ArgumentError("Unknown value for VideoAccelerationType: $value"),
+        _ => throw ArgumentError(
+            'Unknown value for VideoAccelerationType: $value'),
       };
 }