Verilator checks should output github actions format

[UnsignedByte]

Currently, lint tests also check for iverilog compilation which does some useful things like erroring when bitwidths don't match, etc.

However, because only svlint supports --github-actions output, only these are highlighted in the files changed tab. We could write a short script to properly format iverilog errors for ease of use.

This could also be done with black, possibly.