ci: add conventional commits PR title validation

Add GitHub Actions workflow to enforce conventional commit format
for pull request titles, ensuring consistent commit message standards
across the project.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: DennisOSRM

.github/workflows/conventional-commits.yml

@@ -0,0 +1,28 @@
+name: Conventional Commits
+
+on:
+  pull_request:
+    types: [opened, edited, synchronize, reopened]
+
+jobs:
+  validate-pr-title:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Validate PR title
+        uses: amannn/action-semantic-pull-request@v5
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          requireScope: false
+          disallowScopes: []
+          types: |
+            feat
+            fix
+            docs
+            style
+            refactor
+            perf
+            test
+            chore
+            ci
+            revert