ENH Cleanup multiview API and enable oblique multiview #1373

Job	Run time
Source distribution	2m 4s
Build wheels on manylinux - x86_64 with Python cp39	2m 3s
Build wheels on manylinux - x86_64 with Python cp310	2m 7s
Build wheels on manylinux - x86_64 with Python cp311	2m 8s
Build wheels on manylinux - x86_64 with Python cp312	2m 3s
Build wheels on macosx - x86_64 with Python cp39	3m 50s
Build wheels on macosx - x86_64 with Python cp310	4m 24s
Build wheels on macosx - x86_64 with Python cp311	4m 13s
Build wheels on Arm M1 with Python cp39	2m 58s
Build wheels on macosx - x86_64 with Python cp312	2m 55s
Build wheels on Arm M1 with Python cp310	1m 58s
Build wheels on win - AMD64 with Python cp39	4m 24s
Build wheels on Arm M1 with Python cp311	2m 11s
Build wheels on win - AMD64 with Python cp310	4m 33s
Build wheels on Arm M1 with Python cp312	2m 16s
Build wheels on win - AMD64 with Python cp311	4m 35s
Build wheels on win - AMD64 with Python cp312	4m 32s
Merge all wheels into one directory	1s
	53m 15s

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