Improve readability of dimension operations

[ckolbPTB]

closes #71

If anybody finds some more cases where the dimension operations could be improved please adapt or post the code line here in the PR.

Note: This PR is supposed to improve on the readability of dimension operations. Making them more general will be the aim of #359

[github-actions[bot]]

Coverage Report

File	Stmts	Miss	Cover	Missing
src/mrpro/algorithms/csm
iterative_walsh.py	15	1	93%	37
src/mrpro/algorithms/dcf
dcf_voronoi.py	53	4	92%	15, 48–49, 76
src/mrpro/algorithms/optimizers
adam.py	20	1	95%	69
src/mrpro/algorithms/reconstruction
DirectReconstruction.py	29	14	52%	40–45, 61–69, 83
IterativeSENSEReconstruction.py	47	27	43%	64–70, 85–92, 106–128
Reconstruction.py	50	24	52%	40, 52–54, 70–77, 94–105
src/mrpro/data
AcqInfo.py	128	2	98%	174, 214
CsmData.py	21	3	86%	14, 58–60
DcfData.py	37	2	95%	17, 65
IData.py	60	3	95%	119, 125, 129
IHeader.py	69	2	97%	76, 110
KHeader.py	157	12	92%	23, 125–129, 156, 206, 217, 224–225, 228, 235
KNoise.py	24	9	62%	39–52
MoveDataMixin.py	126	14	89%	14, 109, 125, 139–141, 202, 265, 279, 358, 378–379, 396–397
QData.py	32	1	97%	42
SpatialDimension.py	44	1	98%	64
TrajectoryDescription.py	14	1	93%	23
acq_filters.py	10	1	90%	47
src/mrpro/data/_kdata
KData.py	97	9	91%	107–108, 117, 125, 179–180, 215, 220–221
KDataRemoveOsMixin.py	29	2	93%	43, 45
KDataSelectMixin.py	20	2	90%	46, 62
KDataSplitMixin.py	48	3	94%	49, 79, 88
src/mrpro/data/traj_calculators
KTrajectoryCalculator.py	25	2	92%	23, 45
KTrajectoryIsmrmrd.py	13	2	85%	41, 50
KTrajectoryPulseq.py	29	1	97%	54
src/mrpro/operators
CartesianSamplingOp.py	50	9	82%	49–50, 55–56, 61–62, 88, 91, 114
ConstraintsOp.py	60	2	97%	46, 48
EndomorphOperator.py	51	2	96%	209, 213
FiniteDifferenceOp.py	27	2	93%	48, 113
FourierOp.py	77	1	99%	131
GridSamplingOp.py	123	9	93%	60–61, 70–71, 78–79, 82, 84, 86
LinearOperator.py	80	4	95%	32, 131, 251, 256
Operator.py	52	1	98%	21
SliceProjectionOp.py	166	8	95%	39, 46, 48, 54, 191, 212, 245, 285
ZeroPadOp.py	16	1	94%	30
src/mrpro/utils
Rotation.py	453	28	94%	58–66, 106, 283, 368, 370, 397, 452, 457, 460, 475, 492, 497, 640, 645, 648, 664, 668, 742, 744, 752–753, 993, 1075
filters.py	62	2	97%	44, 49
slice_profiles.py	45	6	87%	18, 34, 111–114, 147
sliding_window.py	34	1	97%	34
split_idx.py	10	2	80%	43, 47
zero_pad_or_crop.py	31	6	81%	26, 30, 54, 57, 60, 63
TOTAL	3391	227	93%

Tests	Skipped	Failures	Errors	Time
760	0 :zzz:	0 :x:	0 :fire:	1m 9s :stopwatch:

[ckolbPTB]

This https://github.com/PTB-MR/mrpro/blob/296fd305e6ce2a16b2e95b38df18f8e8269b6a23/examples/t1_mapping_with_grad_acq.py#L41

will be fixed in #377