ci: add lint PR title workflow and dependabot github-actions

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: DeepDiver1975

.github/dependabot.yml

@@ -1,5 +1,10 @@
 version: 2
 updates:
+- package-ecosystem: github-actions
+  directory: "/"
+  schedule:
+    interval: weekly
+  open-pull-requests-limit: 10
 - package-ecosystem: npm
   directory: "/"
   schedule:

.github/workflows/lint-pr-title.yml

@@ -0,0 +1,16 @@
+name: Lint PR title
+
+on:
+  pull_request:
+    types:
+      - opened
+      - edited
+      - synchronize
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: amannn/action-semantic-pull-request@48f256284bd46cdaab1048c3721360e808335d50 # v6.1.1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}