ci: add sync files

Signed-off-by: wep21 <border_goldenmarket@yahoo.co.jp>

.github/sync-files.yaml

@@ -0,0 +1,20 @@
+- repository: autowarefoundation/autoware
+  files:
+    - source: CODE_OF_CONDUCT.md
+    - source: CONTRIBUTING.md
+    - source: DISCLAIMER.md
+    - source: LICENSE
+    - source: .github/dependabot.yaml
+    - source: .github/workflows/automatic-rebase.yaml
+    - source: .github/workflows/pre-commit-optional.yaml
+    - source: .github/workflows/semantic-pull-request.yaml
+    - source: .github/workflows/spell-check.yaml
+    - source: .clang-format
+    - source: .markdown-link-check.json
+    - source: .markdownlint.yaml
+    - source: .pre-commit-config-optional.yaml
+    - source: .prettierignore
+    - source: .prettierrc.yaml
+    - source: .yamllint.yaml
+    - source: CPPLINT.cfg
+    - source: setup.cfg

.github/workflows/sync-files.yaml

@@ -0,0 +1,22 @@
+name: sync-files
+
+on:
+  schedule:
+    - cron: 0 19 * * * # run at 4 AM JST
+  workflow_dispatch:
+
+jobs:
+  sync-files:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Generate token
+        id: generate-token
+        uses: tibdex/github-app-token@v1
+        with:
+          app_id: ${{ secrets.APP_ID }}
+          private_key: ${{ secrets.PRIVATE_KEY }}
+
+      - name: Run sync-files
+        uses: autowarefoundation/autoware-github-actions/sync-files@tier4/proposal
+        with:
+          token: ${{ steps.generate-token.outputs.token }}