This involves a refactor to the arm HID code to allow for arbitrary
preambles (such as HID Proximity and Paradox).
The client also borrows from the HID code, but is not shared, so could
use a significant refactor in the future.
add parameter for # bits to read
auto get samples after lf read/snoop (don't need to do a `data samples`
anymore)
add safe function to get DemodBuffer
add some lf demod comments and apply new lf_read function instead of
read then get samples.
fixed output bug in lf t55xx config print
fixed small bug in lf t55xx detect during ST check
