Workflows: Add triage labels to PRs

Author: armsnyder

.github/labeler-pr-triage.yml

@@ -0,0 +1,25 @@
+# PR Labeler documentation: https://github.com/marketplace/actions/labeler
+
+dependencies:
+  - '.github/dependabot.yml'
+  - '**/go.mod'
+  - '**/go.sum'
+documentation:
+  - '**/*.md'
+  - 'docs/**/*'
+  - 'examples/**/*'
+linter:
+  - '.github/workflows/*-lint.yml'
+  - '.golangci.yml'
+provider:
+  - '.go-version'
+  - 'gitlab/**/*'
+  - 'main.go'
+tests:
+  - '**/*_test.go'
+tools:
+  - 'tools/**/*'
+  - 'scripts/**/*'
+  - 'GNUMakefile'
+workflows:
+  - '.github/**/*'

.github/workflows/pr-target.yml

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+# GitHub Action reference: https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions
+#
+# Automation for pull requests that requires "write" access.
+
+name: pr-target
+
+on: [pull_request_target]
+
+permissions:
+  pull-requests: write
+
+jobs:
+  labels:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/labeler@v3
+        with:
+          configuration-path: .github/labeler-pr-triage.yml
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+      - uses: pascalgn/[email protected]
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          # Ignore generated files.
+          IGNORED: |
+            **/go.sum
+            docs/**/*
+        with:
+          sizes: |
+            {
+              "0": "XS",
+              "10": "S",
+              "50": "M",
+              "200": "L",
+              "800": "XL",
+              "2000": "XXL"
+            }