Mask tool. Add ability to output custom imported masks #576

Job	Run time
pip (ubuntu-latest, cpu)	1m 26s
pip (windows-latest, cpu)	3m 0s
conda (ubuntu-latest, nvidia)	6m 51s
pip (windows-latest, directml)	3m 52s
conda (ubuntu-latest, cpu)	6m 34s
conda (macos-latest, nvidia)	7s
conda (macos-latest, cpu)	8s
conda (windows-latest, nvidia)	14m 16s
conda (windows-latest, cpu)	14m 34s
conda (ubuntu-latest, rocm)	7m 1s
conda (windows-latest, directml)	9m 23s
	1h 7m 12s

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