feat(link): output frame_character from data link, add user_data to character

feat(link): add link controller

feat(data): remove ERR state

feat(data): switch to ILS mode in ilas parser when received non K character in CGS

feat(data): do not reset config when switching from ILS to DATA

feat(link): implement ilas parser

feat(link): add part of ilas parsing

fix(link): move start of ilas config to correct octet (3rd), send 28.4 before ilas config

feat(link): add ilas parser declaration

feat(link): add ilas parser testbench

feat(link): add link config record type

feat(link): wait for K character in frame alignment before setting aligned

feat(link): add lane alignment testbench

feat(link): add lane alignment

chore: use ghw format instead of vcd

fix(link): rename data_link package to data_link_pkg

feat(link): constrain alignment integer in char alignment

feat(link): use character_vector in 8b10b decoder

chore: add gitignore

feat(link): add frame alignment test bench