Fix GitLab Pages special behavior

- Rename main deployment job to 'deploy' (runs on all branches)
- Keep 'pages' job for GitLab Pages (only runs on main branch)
- Ghost-upload jobs now depend on 'deploy' instead of 'pages'
- Fixes pipeline creation issues on feature branches

.gitlab-ci.yml

@@ -22,7 +22,7 @@ staging:
     paths:
       - public
 
-pages:
+deploy:
   stage: deploy
   script:
     - echo "Publishing site..."
@@ -32,5 +32,18 @@ pages:
     paths:
       - public
 
+# GitLab Pages deployment (only on main branch)
+pages:
+  stage: deploy
+  script:
+    - echo "Publishing to GitLab Pages..."
+  needs:
+    - deploy
+  artifacts:
+    paths:
+      - public
+  rules:
+    - if: "$CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH"
+
 include:
   - local: ghost-upload/.gitlab-ci.yml