Tests

Draft implementation of point estimation #470

Job	Run time
lint	1m 20s
test (ubuntu-latest, 3.10, jax)	9m 2s
test (ubuntu-latest, 3.10, tensorflow)	22m 1s
test (ubuntu-latest, 3.10, torch)	11m 56s
test (ubuntu-latest, 3.11, jax)	9m 43s
test (ubuntu-latest, 3.11, tensorflow)	24m 11s
test (ubuntu-latest, 3.11, torch)	12m 41s
test (windows-latest, 3.10, jax)	16m 31s
test (windows-latest, 3.10, tensorflow)	32m 40s
test (windows-latest, 3.10, torch)	18m 45s
test (windows-latest, 3.11, jax)	17m 21s
test (windows-latest, 3.11, tensorflow)	35m 14s
test (windows-latest, 3.11, torch)	21m 17s
	3h 52m 42s

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