.github: workflow to update metadata (#257)

Provides a Github Actions Workflow which creates a PR to update third-party package metadata.

PR is created with a new "cadobot" Github App.

.github/workflows/metadata.yml

@@ -0,0 +1,45 @@
+name: metadata
+permissions:
+  contents: read
+on:
+  schedule:
+    - cron: "24 5 * * 0"
+jobs:
+  update:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Install Go
+        uses: actions/setup-go@37335c7bb261b353407cff977110895fa0b4f7d8 # v2.1.3
+        with:
+          go-version: 1.18.x
+      - name: Checkout code
+        uses: actions/checkout@5a4ac9002d0be2fb38bd78e4b4dbde5606d7042f # v2.3.4
+        with:
+          persist-credentials: false
+      - name: Bootstrap
+        run: ./script/bootstrap
+      - name: Update Package Metadata
+        working-directory: tests/thirdparty
+        run: go test -v -run Metadata -update -net -prjs projects.json
+      - name: Diff
+        run: git diff
+      - name: Generate
+        run: ./script/generate
+      - name: Diff
+        run: git diff
+      - name: Generate Bot Token
+        uses: tibdex/github-app-token@586e1a624db6a5a4ac2c53daeeded60c5e3d50fe # v1.5.2
+        id: bot
+        with:
+          app_id: ${{ secrets.APP_ID }}
+          private_key: ${{ secrets.APP_PRIVATE_KEY }}
+      - name: Create Pull Request
+        uses: peter-evans/create-pull-request@bd72e1b7922d417764d27d30768117ad7da78a0e # v4.0.2
+        with:
+          token: ${{ steps.bot.outputs.token }}
+          commit-message: "tests/thirdparty: update package metadata"
+          branch: auto-tests-thirdparty-update-metadata
+          base: master
+          delete-branch: true
+          title: "tests/thirdparty: update package metadata"
+          body: "Auto-generated update of third-party package metadata."