Add Pages Preview Deployment

.github/workflows/pages.yml

@@ -6,6 +6,7 @@ on:
     branches: [ "main" ]
   pull_request:
     branches: [ "main" ]
+    types: [ "opened", "reopened", "synchronize", "closed" ]
   merge_group:
 
 jobs:
@@ -37,8 +38,8 @@ jobs:
         path: docs/.vitepress/dist
 
   deploy:
-    if: github.ref_name == github.event.repository.default_branch
     runs-on: ubuntu-24.04
+    if: github.ref_name == github.event.repository.default_branch
     needs: [ build ]
     permissions:
       pages: write
@@ -50,3 +51,21 @@ jobs:
     - name: Deploy to GitHub Pages
       id: deployment
       uses: actions/deploy-pages@d6db90164ac5ed86f2b6aed7e0febac5b3c0c03e # v4
+
+  preview:
+    runs-on: ubuntu-24.04
+    if: github.ref_name != github.event.repository.default_branch
+    needs: [ build ]
+    permissions:
+      pages: write
+      id-token: write
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    steps:
+    - uses: rossjrw/pr-preview-action@v1
+      if: github.ref_name != github.event.repository.default_branch
+      with:
+        source-dir: build
+        preview-branch: main
+        umbrella-dir: docs/pr-preview