add docs for all jwst instrument options flags

[mperrin]

These may not all be in the docs already. Any which aren't, add 'em.

• source_offset_x, source_offset_y, source_offset_r, source_offset_theta
• pupil_shift_x, pupil_shift_y
• coron_shift_x, coron_shift_y
• lrs_slit_offset_x, lrs_slit_offset_y
• force_fqpm_shift
• coron_include_pre_lyot_plane
• lrs_use_mft
• jitter, jitter_kernel, jitter_sigma
• add_ipc
• crop_psf
• output_mode
• nd_squares
• ifualign_rotation
• bar_offset