Make soft delay optional

[ckolbPTB]

The soft delay option is not yet widely supported by different pulseq interpreters. Here we make it optional.

[github-actions]

Coverage Report

File	Stmts	Miss	Cover	Missing
/home/runner/.local/lib/python3.12/site-packages/mrseq
_version.py	7	7	0%	2–9
/home/runner/.local/lib/python3.12/site-packages/mrseq/preparations
t2_prep.py	51	1	98%	195
/home/runner/.local/lib/python3.12/site-packages/mrseq/sequences
epi2d_fid.py	128	9	93%	256, 359, 416–421, 433, 439
epi2d_se.py	148	12	92%	204–206, 317, 420, 477–482, 494, 500
grpe_flash_dixon.py	205	18	91%	121, 124, 189, 206–208, 330, 349, 400, 410, 512, 580–585, 597, 603
radial_flash.py	140	11	92%	101, 104, 259, 353, 411–416, 428, 434
spiral_flash.py	120	10	92%	95, 231, 320, 370–375, 387, 393
t1_inv_rec_gre_single_line.py	93	9	90%	162, 263, 306–311, 330, 336
t1_inv_rec_se_single_line.py	106	9	92%	219, 324, 383–388, 407, 413
t1_molli_bssfp.py	145	13	91%	221, 289–291, 306, 391, 446–451, 463, 469
t1_t2_spiral_cmrf.py	153	12	92%	93, 99, 118, 172, 405, 453–458, 472, 478
t1rho_se_single_line.py	102	8	92%	318, 375–380, 399, 405
t2_multi_echo_se_single_line.py	96	9	91%	162, 268, 321–326, 344, 350
t2_t2prep_flash.py	147	15	90%	107, 231, 249, 284–286, 298, 383, 446–451, 463, 469
t2star_multi_echo_flash.py	147	14	90%	118, 238, 286–288, 300, 405, 468–473, 485, 491
/home/runner/.local/lib/python3.12/site-packages/mrseq/utils
EpiReadout.py	331	90	73%	52, 61, 193, 197, 244, 318, 321–332, 454, 507–591, 737–743, 763–808
cartesian_sampling.py	37	2	95%	38, 80
sequence_helper.py	59	4	93%	105, 133–134, 162
spiral_sampling.py	67	1	99%	79
TOTAL	2463	254	90%

Tests	Skipped	Failures	Errors	Time
1491	0 💤	0 ❌	0 🔥	2m 12s ⏱️