Convert colon-delimited linting report to GitHub Annotations format

convert-lint-to-github-annotations-format.yaml

# Pretty sure this will work, 
      run:
        - |
          gofmt -l . 2>&1
          | jq -Rn '[
              inputs
              | split(":")
              | {
                  "path": .[0],
                  "start_line":   (.[1] | tonumber),
                  "end_line":     (.[1] | tonumber),
                  "start_column": (.[2] | tonumber),
                  "end_column":   (.[2] | tonumber),
                  "annotation_level": "failure",
                  "annotation":   (.[3:]|join(":")|gsub("^ +| +$";""))
                }
              ]' > annotations.json