Fix types

[fzimmermann89]

This fixes all type issues in tests and some other inconsistencies.

• Make the KData mixins return a Self (i.e. KData). So, for example, KData.remove_oversampling will now result in KData (used to be Any)
• Fix issues caused by using numpy in the rotation tests. Widen allowed types in Rotation from only tensor inputs to also allow nested sequences of floats.
• Add type ignores for paths that can never be reached according to the type hints but are tested anyways
• Allow a single int as size for RandomGenerator
• Make return_sensitivity in Rotation.align_vectors a keyword-only argument, and overload the return type conditional on its value

DO NOT CLICK THE MERGE BUTTON without considering the order of merges according to the stack..

[fzimmermann89]

Stack from ghstack (oldest at bottom):

• Precommit: run mypy on all files, including tests. #283
• -> Fix types #282
• Add EndomorphOperator #280
• Unify .to / .cpu / .cuda for data classes #279

[github-actions]

Coverage Report

File	Stmts	Miss	Cover	Missing
src/mrpro/algorithms/csm
_iterative_walsh.py	15	1	93%	34
src/mrpro/algorithms/optimizers
_adam.py	17	1	94%	82
src/mrpro/algorithms/reconstruction
_direct_reconstruction.py	63	36	43%	53–58, 75–83, 95–97, 113–120, 134–145
_reconstruction.py	10	1	90%	20
src/mrpro/data
_AcqInfo.py	83	2	98%	100, 138
_CsmData.py	21	3	86%	28, 72–74
_DcfData.py	91	5	95%	36, 42, 86, 111, 199
_IData.py	61	3	95%	136, 142, 146
_IHeader.py	59	2	97%	80, 107
_KHeader.py	127	9	93%	37, 84, 122, 167, 178, 185–186, 189, 196
_KNoise.py	22	9	59%	54–67
_MoveDataMixin.py	133	14	89%	36, 130, 146, 160–162, 223, 286, 300, 379, 399–400, 417–418
_QData.py	31	1	97%	56
_SpatialDimension.py	46	1	98%	80
_TrajectoryDescription.py	14	1	93%	38
src/mrpro/data/_kdata
_KData.py	108	7	94%	104–105, 175–176, 218, 223–224
_KDataRemoveOsMixin.py	30	2	93%	53, 55
_KDataSelectMixin.py	22	2	91%	62, 78
_KDataSplitMixin.py	51	3	94%	67, 97, 106
src/mrpro/data/traj_calculators
_KTrajectoryCalculator.py	27	2	93%	40, 62
_KTrajectoryIsmrmrd.py	16	2	88%	58, 67
_KTrajectoryPulseq.py	30	1	97%	69
src/mrpro/operators
_CartesianSamplingOp.py	50	9	82%	63–64, 69–70, 75–76, 102, 105, 128
_ConstraintsOp.py	61	2	97%	38, 40
_EndomorphOperator.py	57	3	95%	219, 223, 227
_FastFourierOp.py	31	2	94%	84, 94
_FourierOp.py	78	1	99%	146
_GridSamplingOp.py	123	9	93%	74–75, 84–85, 92–93, 96, 98, 100
_LinearOperator.py	64	3	95%	41, 142, 147
_Operator.py	56	1	98%	38
_SliceProjectionOp.py	168	8	95%	55, 62, 64, 70, 192, 213, 246, 286
_ZeroPadOp.py	16	1	94%	44
src/mrpro/utils
_Rotation.py	457	30	93%	60–70, 110, 287, 373, 375, 388, 445, 450, 453, 468, 484, 488, 633, 638, 641, 656, 659, 734, 736, 744–745, 985, 1067
_split_idx.py	10	2	80%	57, 61
_zero_pad_or_crop.py	31	6	81%	40, 44, 68, 71, 74, 77
filters.py	68	6	91%	48–50, 75, 80, 87
slice_profiles.py	45	6	87%	31, 47, 124–127, 160
sliding_window.py	35	1	97%	47
TOTAL	3207	198	94%

Tests	Skipped	Failures	Errors	Time
656	0 💤	0 ❌	0 🔥	1m 1s ⏱️