Add design rules compliance CI job

[apcountryman]

Add design rules compliance CI job. The proposed design was outlined in #8.

• [ ] Add design rules compliance check CI script (ci/check-design-rules-compliance)
  • [ ] Supported options:
    • [ ] --help: See other project scripts
    • [ ] --version: See other project scripts
    • [ ] --ignore-unconnected-nets: Ignore unconnected net DRC errors
  • [ ] function error(): See other project scripts
  • [ ] function abort(): See other project scripts
  • [ ] function display_help_text(): See other project scripts
  • [ ] function display_version(): See other project scripts
  • [ ] function main(): See other project scripts
  • [ ] function check_design_rules_compliance() (the ignore_unconnected_nets should be populated with --ignore_unconnected if the --ignore-unconnected-nets option is passed to the script):

    
    local layouts; mapfile -t layouts < <( git -C "$repository" ls-files '*.kicad_pcb' | xargs -r -d '\n' -I '{}' find "$repository/{}" ); readonly layouts

for layout in "${layouts[@]}"; do if ! "$repository/utilities/KiAuto/src/pcbnew_do" run_drc "$ignore_unconnected_nets" "$layout" "$repository"; then cat "$repository/"*.drt abort fi done

- [ ] Add design rules compliance check CI job (`check-design-rules-compliance`) to `.github/workflows/ci.yml`
    - [ ] `name: Check design rules compliance`
    - [ ] Steps:
        - [ ] Checkout (needs submodules)
        - [ ] `name: Check design rules compliance`, `run: ./ci/check-design-rules-compliance --ignore-unconnected-nets`