Add color handling via click.style and click.echo

[clairexen]

:rainbow:

[mmicko]

When testing, I have noticed some non-colored lines in output, those were coming from : https://github.com/YosysHQ/sby/blob/claire/click/sbysrc/sby.py#L181 https://github.com/YosysHQ/sby/blob/claire/click/sbysrc/sby.py#L571

[mmicko]

For each sby_mode file there is log line

task.log(f"""engine_{engine_idx}: {" ".join(engine)}""")

Maybe that one should use magenta color for engine_xxx part ?

[lethalbit]

Is there any reason for using click rather than something such as rich? In my opinion it's in general better for output than click, and handling args with the argsparse package works just as well.

Just wondering.