feat: rename jesd204b_rx to jesd204b_link_rx as it supports only one link

feat: make sync aligned to frame clock

Resolves #21

feat: allow synchronization request from outside

feat: count errors in multiframe instead of a frame

feat: prepare architecture for descrambling

fix(lane_alignment): set user data for a character based on state WHILST character is received

User data should be true for data from converters (or sometimes test mode data).
Before, user data were set upon outputting data from the buffer,
but that led to cases where ILAS sequence was counted
as user_data, because it was saved without information about
state of the character and it was assumed the state is the same
upon saving and outputting the octet.

chore: update LICENSE copyright year

feat: move all link configuration to generic instead of ports

Configuration is same for one compilation, it cannot change.
Thus it does not make sense to be a port.
Resolves #13.

feat(tests): add tests for jesd204b_rx toplevel entity

feat(toplevel): order all arrays correctly using "to" instead of "downto"

fix(lane): output user_data based on current link state in lane_alignment

fix(ilas): output error if there is more than 3 multiframes

fix(ilas): do not check chksum

fix(ilas): output finished right after ils state ends

feat: remove unnecessary big buffer (3 * buffer_size) from ring_buffer

chore: update frame alignment tb

fix: update data link layer to meet changes

feat: update jesd204b_rx to new frame clock

fix: calculate octets in multiframe from input in ilas parser

fix: make char alignment work for part characters correctly