Fit a cluster nearby peaks starting from a seed table of chemical shifts
fit_peak_cluster(
spec_list,
cs_start,
spec_ord,
f_alpha_thresh = 0.001,
omega0_plus = c(0.075, 0.75),
r2_start = 5,
r2_bounds = c(0.5, 20),
sc_start = NULL,
sc_bounds = c(0, Inf),
plot_main_prefix = NULL,
peak_num_offset = 0,
plot_fit_stages = FALSE
)