Important changes:

• #20370 Python typing stubs.
• #23350 Fix reference counting errors in registerNewType.
• #23399, #23436, #23138 Fixed ChAruco and diamond boards detector bindings.
• #23371 Added bindings to allow GpuMat and Stream objects to be initialized from memory initialized in other libraries
• #23691 np.float16 support.
• Python bindings for RotatedRect, CV_MAKETYPE, CV_8UC(n).
• Several build fixes for OpenCV-Python package