feat: Move SimpleShowMaskRPT from niworkflows #489

Job	Run time
build	39s
test (ubuntu-latest, 3.8, x64, .)	4m 55s
test (ubuntu-latest, 3.8, x64, dist/*.whl)	4m 48s
test (ubuntu-latest, 3.8, x64, dist/*.tar.gz)	4m 50s
test (ubuntu-latest, 3.9, x64, .)	4m 45s
test (ubuntu-latest, 3.9, x64, dist/*.whl)	4m 28s
test (ubuntu-latest, 3.9, x64, dist/*.tar.gz)	4m 11s
test (ubuntu-latest, 3.10, x64, .)	4m 5s
test (ubuntu-latest, 3.10, x64, dist/*.whl)	4m 36s
test (ubuntu-latest, 3.10, x64, dist/*.tar.gz)	4m 10s
test (ubuntu-latest, 3.11, x64, .)	4m 36s
test (ubuntu-latest, 3.11, x64, dist/*.whl)	3m 46s
test (ubuntu-latest, 3.11, x64, dist/*.tar.gz)	4m 2s
test (ubuntu-latest, 3.12, x64, .)	4m 36s
test (ubuntu-latest, 3.12, x64, dist/*.whl)	5m 39s
test (ubuntu-latest, 3.12, x64, dist/*.tar.gz)	4m 57s
deploy	0s
	1h 9m 3s

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