Add spatial CBMR estimator and tutorial #1558

Job	Run time
Determine if CI should be skipped	6s
Unit tests with minimum dependency versions (ubuntu-latest, 3.10)	49m 43s
Smoke performance tests (ubuntu-latest, 3.13)	7m 26s
Estimator performance tests (ubuntu-latest, 3.13)	3m 7s
CBMR ImportError tests (ubuntu-latest, 3.13)	1m 18s
Corrector performance tests (ubuntu-latest, 3.13)	9m 10s
Unit tests (ubuntu-latest, 3.12)	48m 44s
Unit tests (ubuntu-latest, 3.14)	15m 52s
Unit tests (ubuntu-latest, 3.10)	51m 5s
Unit tests (windows-latest, 3.13)	26m 45s
Unit tests (windows-latest, 3.10)	1h 0m 53s
Unit tests (macos-latest, 3.13)	15m 38s
Unit tests (macos-latest, 3.11)	33m 3s
Unit tests (macos-latest, 3.14)	13m 42s
Unit tests (macos-latest, 3.12)	32m 53s
Unit tests (windows-latest, 3.12)	56m 53s
Unit tests (macos-latest, 3.10)	33m 18s
Unit tests (ubuntu-latest, 3.13)	19m 43s
Unit tests (windows-latest, 3.14)	18m 24s
Unit tests (windows-latest, 3.11)	45m 43s
Unit tests (ubuntu-latest, 3.11)	51m 46s
Upload coverage	13s
	9h 55m 25s

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