Issue #3449755 by jwilson3: Add Ddev Drupal Contrib for ease-of-maintenance

Closes #3449755

.ddev/addon-metadata/ddev-drupal-contrib/manifest.yaml

+name: ddev-drupal-contrib
+repository: ddev/ddev-drupal-contrib
+version: 1.0.0.-rc16
+install_date: "2024-05-25T07:35:25-05:00"
+project_files:
+    - commands
+    - config.contrib.yaml
+global_files: []
+removal_actions: []