clean up

[ckolbPTB]

This fixes #126 and hopefully makes the rest of the code a bit more consistent.

[github-actions]

Coverage Report

File	Stmts	Miss	Cover	Missing
src/mrpro/algorithms
_remove_readout_os.py	30	2	93%	47, 49
src/mrpro/data
_AccelerationFactor.py	13	13	0%	15–36
_AcqInfo.py	64	1	98%	93
_DcfData.py	78	3	96%	71, 97, 178
_IData.py	57	7	88%	43, 48, 109, 114, 122, 128, 132
_IHeader.py	58	2	97%	86, 113
_KData.py	86	6	93%	83–84, 126, 153, 158–159
_KHeader.py	125	9	93%	34, 81, 119, 170, 181, 188–189, 192, 199
_KNoise.py	21	9	57%	48–61
_SpatialDimension.py	39	5	87%	74, 77, 84–86
_TrajectoryDescription.py	14	1	93%	35
src/mrpro/data/traj_calculators
_KTrajectoryCalculator.py	16	1	94%	37
_KTrajectoryIsmrmrd.py	16	2	88%	55, 65
_KTrajectoryPulseq.py	36	1	97%	72
_KTrajectoryRadial2D.py	26	2	92%	49, 53
_KTrajectoryRpe.py	43	2	95%	109, 111
src/mrpro/operators
_FourierOp.py	116	6	95%	43–50, 198, 248
_LinearOperator.py	21	3	86%	28, 47, 52
_Operator.py	8	1	88%	27
src/mrpro/utils
_rgetattr.py	3	1	67%	20
TOTAL	1318	77	94%

Tests	Skipped	Failures	Errors	Time
74	0 💤	0 ❌	0 🔥	31.129s ⏱️

[fzimmermann89]

Re the other dimension:

I would prefer if we allow in our code for this dimension to actually be more than 1 dimensnion.
So we dont split the KData into dynamics, ... by default, but our code works if it is split.

This would, as a start, mean replacing 'other' by '...' in all einops pattern, and counting dimensions from the back for swapaxes etc.

What do you think, Christoph?

[ckolbPTB]

I think any change which makes the code more general is a good idea. As this will probably require more changes than a few clean-up ones, I created an issue for this #138