triage: add GitHub Actions to triage issues and PRs

.github/dependabot.yaml

@@ -0,0 +1,10 @@
+version: 2
+updates:
+  - package-ecosystem: "gomod"
+    directory: "/"
+    schedule:
+      interval: "daily"
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"

.github/labeler.yaml

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+github-actions:
+  - changed-files:
+      - any-glob-to-any-file:
+        - '.github/**'
+
+dependencies:
+  - changed-files:
+      - any-glob-to-any-file:
+        - 'go.mod'
+        - 'go.sum'
+
+documentation:
+  - changed-files:
+      - any-glob-to-any-file:
+        - 'README.md'
+        - COMPATIBILITY.md
+        - 'docs/**'
+
+tests:
+  - changed-files:
+      - any-glob-to-any-file:
+        - '**/*_test.go'
+
+convert:
+  - changed-files:
+      - any-glob-to-any-file:
+        - 'cty/convert/*'
+
+functions:
+  - changed-files:
+      - any-glob-to-any-file:
+        - 'cty/function/*.go'
+
+functions/stdlib:
+  - changed-files:
+      - any-glob-to-any-file:
+        - 'cty/function/stdlib/*.go'
+
+gocty:
+  - changed-files:
+      - any-glob-to-any-file:
+        - 'cty/gocty/*.go'
+
+json:
+  - changed-files:
+      - any-glob-to-any-file:
+        - 'cty/json/*.go'
+
+msgpack:
+  - changed-files:
+      - any-glob-to-any-file:
+        - 'cty/msgpack/*.go'
+
+set-internals:
+  - changed-files:
+      - any-glob-to-any-file:
+        - 'cty/set/*.go'

.github/workflows/triage-issue.yaml

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+name: Triage Issue
+on:
+  issues:
+    types:
+      - reopened
+      - opened
+jobs:
+  label_issues:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+    steps:
+      - run: gh issue edit "$NUMBER" --add-label "$LABELS"
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GH_REPO: ${{ github.repository }}
+          NUMBER: ${{ github.event.issue.number }}
+          LABELS: needs-triage

.github/workflows/triage-pr.yaml

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+name: "Triage PR"
+on:
+- pull_request_target
+
+jobs:
+  triage:
+    permissions:
+      contents: read
+      pull-requests: write
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/labeler@v5
+      with:
+        configuration-path: .github/labeler.yaml