chore: specify ranges for all integers

Ranges are not needed inside of tesbenches.
Resolves #22.

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.

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

fix: calculate octets in multiframe from input in ilas parser

chore: add documentation to the code

fix(link): make testbenches work in quartus, fix old testbenches

fix(link): check that characters in ilas parser are control characters

ILAS parser did not check that characters are control characters,
error would be encountered if there was R or A non-kout character

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

feat(link): add ilas parser declaration