Workflows: Add triage labels to PRs

Adam Snyderrequested to merge
github/fork/armsnyder/workflow-pr-triage-labels into master

Description

closes #428 (closed)

New workflows for pull requests that automatically add size/* and other area-like labels to pull requests.

Tested in my fork.

PR Checklist

  • Resource attributes match 1:1 the names and structure of the API resource in the GitLab API documentation.
  • Examples are updated with:
    • A *.tf file for the resource/s with at least one usage example
    • A *.sh file for the resource/s with an import example (if applicable)
  • New resources have at minimum a basic test with three steps:
    • Create the resource
    • Update the attributes
    • Import the resource
  • No new //lintignore comments that came from copied code. Linter rules are meant to be enforced on new code.

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