Generate slither warnings in GitHub Actions instead of erroring

ci.yml

name: CI
on:
  pull_request:

jobs:
  run-slither:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          submodules: recursive
      
      - name: Install slither
        run: pip3 install slither-analyzer

      - name: Run slither
        run: |
          slither --fail-none --json - . | jq '.results.detectors[] | .elements[0].source_mapping as $src | "::\( if .impact == "High" then "error" elif .impact == "Medium" then "warning" else "notice" end ) file=\( $src.filename_relative ),col=\( $src.starting_column ),endColumn=\( $src.ending_column ),line=\( $src.lines[0] )\( if $src.lines[0] == $src.lines[-1] then "" else ",endLine=" + "\( $src.lines[-1] )" end )::\( .description )"' | xargs -n1 echo