[v1.5.x] Refactor set_block() and get_block() functions

[mcencini]

This PR refactors set_block() and get_block() to align with upstream MATLAB repository and enable inclusion of new extensions. Specifically:

1. set_block(): gradient continuity check is moved to a separate function to improve readability and aligned to upstream MATLAB repository to enable rotation extension aware gradient continuity check.
2. get_block() : function is refactored to aligned with upstream MATLAB repository and enable addition of rotation and rf shim extensions.

All changes are purely internal and do not impact current functionality / API; also, this can fit 1.5.0 version as it does not depend on interpreter support.

[github-actions]

Coverage Report

File	Stmts	Miss	Cover	Missing
/home/runner/.local/lib/python3.12/site-packages/pypulseq
add_gradients.py	137	60	56%	44, 52, 58, 61, 75–86, 92, 125–128, 135–136, 155, 162, 167–263
add_ramps.py	36	36	0%	1–92
align.py	35	4	89%	41, 45, 69, 73
calc_duration.py	33	2	94%	43, 50
calc_ramp.py	220	216	2%	48–359
calc_rf_bandwidth.py	37	28	24%	45–81, 85–89
check_timing.py	96	29	70%	78, 82, 107, 180, 199, 232, 239, 249–293
compress_shape.py	30	1	97%	28
convert.py	40	8	80%	42, 48, 66, 72–73, 82, 88–89
event_lib.py	96	14	85%	6–9, 48–51, 70–71, 205–210
make_adc.py	98	14	86%	77, 80, 90–94, 97, 146, 149, 153, 159, 163, 202, 204, 206, 214
make_adiabatic_pulse.py	132	39	70%	208–212, 232–236, 244–245, 268, 274, 343–362, 466–475, 513–521
make_arbitrary_grad.py	53	15	72%	71, 74, 77, 80, 96–98, 107, 109, 117–121, 130
make_arbitrary_rf.py	75	63	16%	95–179
make_block_pulse.py	48	3	94%	121–125, 128
make_delay.py	9	1	89%	27
make_digital_output_pulse.py	16	2	88%	42, 50
make_extended_trapezoid.py	56	12	79%	67, 70, 76, 82, 85, 88, 91, 94, 116, 134, 136, 139
make_extended_trapezoid_area.py	104	4	96%	68, 71, 261, 264
make_gauss_pulse.py	73	20	73%	142–146, 149–173, 180, 183
make_label.py	22	4	82%	64, 66, 68, 75
make_sigpy_pulse.py	119	30	75%	12–13, 122, 125, 129, 166–170, 174, 177–178, 181–182, 197, 204, 209, 221, 224, 249–259, 273, 276, 306–316
make_sinc_pulse.py	70	10	86%	104, 110, 138–142, 146, 149–150, 153–154, 176
make_soft_delay.py	26	2	92%	107, 125
make_trapezoid.py	111	7	94%	177, 190, 196, 214, 232, 237, 255
make_trigger.py	16	2	88%	47, 55
opts.py	66	9	86%	78, 83, 102, 142, 166–170
points_to_waveform.py	9	1	89%	27
rotate.py	69	14	80%	15, 55, 66–69, 85–90, 112, 119–120
scale_grad.py	30	1	97%	65
sigpy_pulse_opts.py	26	7	73%	34–41
split_gradient.py	39	31	21%	46–103
split_gradient_at.py	70	27	61%	63–90, 110, 114, 118–120, 154–156
traj_to_grad.py	13	9	31%	26–40
/home/runner/.local/lib/python3.12/site-packages/pypulseq/SAR
SAR_calc.py	5	1	80%	9
/home/runner/.local/lib/python3.12/site-packages/pypulseq/Sequence
block.py	452	61	87%	64, 67, 75, 81, 96, 104, 110, 121, 124, 127, 135, 140, 149, 160, 168, 208, 210, 214, 329, 333, 336, 357, 372, 382, 393, 402, 432–440, 447, 460, 471, 480–484, 502, 534–541, 558, 568, 594, 632, 650, 653, 671, 685, 712, 791, 828, 852
calc_grad_spectrum.py	81	76	6%	68–190
calc_pns.py	40	31	22%	45–96
ext_grad_check.py	75	9	88%	55, 60, 174–181
ext_test_report.py	167	11	93%	79, 156, 167–168, 337–343
install.py	75	42	44%	31, 52, 69, 71, 112–131, 148, 181–184, 200–212, 254–278
parula.py	4	2	50%	19–86
read_seq.py	400	39	90%	44–45, 110, 117, 130, 133–134, 138, 184, 228, 401, 422–439, 502, 505, 590, 614, 654, 685, 701–705, 712, 823, 834
sequence.py	640	133	79%	10–13, 107–117, 138–151, 205, 270–273, 320, 364, 440, 467–472, 509, 537–540, 631, 659–668, 680, 702, 743–746, 775, 801–807, 842, 853–854, 860, 871, 877, 879, 887, 920–928, 1060, 1158, 1164, 1167, 1170, 1207, 1332–1345, 1403, 1425–1427, 1448, 1511, 1519, 1617, 1628–1641, 1710–1711, 1722–1740, 1764, 1794–1802, 1838, 1852–1862
write_seq.py	362	7	98%	45, 77–79, 313, 347–349, 499
/home/runner/.local/lib/python3.12/site-packages/pypulseq/utils
cumsum.py	14	1	93%	17
paper_plot.py	63	58	8%	49–132
safe_pns_prediction.py	126	113	10%	50–87, 102–189, 197–214, 222, 244–250, 279–286, 310–336, 344–383, 396–411, 415
seq_plot.py	407	186	54%	22, 106, 138–139, 159, 176–178, 183–225, 235–242, 249–314, 318–324, 328–336, 359, 361, 363, 390–412, 457–458, 461–464, 487–496, 508, 525–535, 544–546, 565–567, 569–570, 572–573, 657–658, 674–691, 739–743
tracing.py	16	6	62%	33–34, 42, 54–55, 75
/home/runner/.local/lib/python3.12/site-packages/pypulseq/utils/siemens
asc_to_hw.py	58	53	9%	21–28, 48–106
readasc.py	59	7	88%	103–104, 110–111, 122–124
TOTAL	5260	1561	70%

Tests	Skipped	Failures	Errors	Time
1288	24 💤	0 ❌	0 🔥	3m 47s ⏱️

[schuenke]

I am currently reviewing this. Are you fine with me commiting changes directly or would you prefer comments only?

[mcencini]

Hi Patrick, of course I am fine, and thank you very much!