ci: extend workflow to validate builds on PRs

Renames publish-docs to continuous-delivery and extends it to
build documentation on all pull requests. This ensures that builds
are validated before merging while maintaining the same deployment
behavior for the main branch.

The deploy job runs conditionally only when on the main branch,
supporting both push events and manual workflow_dispatch.

Signed-off-by: Marco Nenciarini <marco.nenciarini@enterprisedb.com>

Author: mnencia

.github/workflows/publish-docs.yml .github/workflows/continuous-delivery.yml.github/workflows/publish-docs.yml renamed to .github/workflows/continuous-delivery.yml

@@ -1,9 +1,10 @@
-# This workflow builds and deploys the Docusaurus documentation to GitHub Pages
-# when changes are pushed to the main branch.
-name: Deploy Docusaurus to GitHub Pages
+# This workflow builds the Docusaurus documentation on pull requests
+# and deploys it to GitHub Pages when changes are pushed to main.
+name: Continuous Delivery
 
 on:
   workflow_dispatch:
+  pull_request:
   push:
     branches:
       - main
@@ -38,6 +39,7 @@ jobs:
           cache-dependency-path: website/yarn.lock
 
       - name: Setup Pages
+        if: github.ref == 'refs/heads/main'
         uses: actions/configure-pages@983d7736d9b0ae728b81ab479565c72886d7745b # v5
 
       - name: Install dependencies
@@ -49,11 +51,13 @@ jobs:
         run: yarn build
 
       - name: Upload artifact
+        if: github.ref == 'refs/heads/main'
         uses: actions/upload-pages-artifact@7b1f4a764d45c48632c6b24a0339c27f5614fb0b # v4
         with:
           path: website/build
 
   deploy:
+    if: github.ref == 'refs/heads/main'
     permissions:
       pages: write
       id-token: write