(stereo) fisheye calibration with ChArUco not supported

[rursprung]

#976 has added support for stereo calibration using ChArUco boards.

however, it seems that it is not supported with a fisheye model:

image_pipeline/camera_calibration/src/camera_calibration/mono_calibrator.py

Lines 113 to 116 in bb4ab63

	if self.pattern == Patterns.ChArUco:
	if self.camera_model == CAMERA_MODEL.FISHEYE:
	raise NotImplemented(
	"Can't perform fisheye calibration with ChArUco board")

(note though that the exception is thrown in the "mono" code, so i guess it doesn't work there either)

this is not indicated anywhere (see also #1054 for my painful experience in learning this). i'm not sure why it wouldn't be supported - it should work out of the box from what i understand if you can detect the charuco markers and then call the cv::fisheye::stereoCalibrate method (both of which you independently can)