ADD: subclass method read_segment to read segments of sqd files

ADD: preload kwarg

ENH: comment
WIP: read_segment

test produced error: (shapes (193, 1002), (193, 1000) mismatch)
ENH: _read_segment method for preload=False

Includes a read-write test for verification.
ENH: new test for read_segment method
ENH: gives optionality to trigger specification, ADD: endianness
ENH: new _read_events method
ENH: sel kwarg
ENH: add readability to sqd parameters attribute
ENH: simplified parameters
ENH: separate parameters from constants, employ standard dict
ENH: make get_sqd_params a module level function, address KIT issue
ENH: address all comments
FIX: indexes the proper channels for remove the gain

accidentally broke it.
ENH: increase read_stim_ch execution speed
ENH: spelling, fix typos
ENH: standardize dtype
ENH: remove redundancy, cosmetics, update files with an event
ENH: add errors
ENH: add sel argument, simplified read_stim_ch
ENH: remove unused argument