Move detection (2d/3d filtering, structure splitting) to PyTorch #698

Job	Run time
Check Linting	17s
Check Manifest	23s
Run tests with numba disabled	32m 53s
Run brainmapper tests to check for breakages	33m 44s
Run package tests (ubuntu-latest, 3.10)	38m 16s
Run package tests (ubuntu-latest, 3.11)	27m 12s
Run package tests (ubuntu-latest, 3.12)	37m 40s
Run package tests (macos-latest, 3.12)	28m 6s
Run package tests (windows-latest, 3.12)	29m 54s
Build source distribution and wheel	0s
Publish build distributions	0s
	3h 48m 25s

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