add empty extension pages

docs/src/docPages/api/extensions/collaboration-cursor.md

@@ -0,0 +1,2 @@
+# Collaboration Cursor
+

docs/src/docPages/api/extensions/collaboration.md

@@ -1,2 +1,2 @@
 # Collaboration
-Enables you to collaborate with others on one document.
+Enables you to collaborate with others on one document.

docs/src/links.yaml

@@ -116,9 +116,12 @@
         # - title: CodeBlockHighlight
         #   link: /api/extensions/code-block-highlight
         #   draft: true
-        # - title: Collaboration
-        #   link: /api/extensions/collaboration
-        #   draft: true
+        - title: Collaboration
+          link: /api/extensions/collaboration
+          draft: true
+        - title: CollaborationCursor
+          link: /api/extensions/collaboration-cursor
+          draft: true
         - title: Document
           link: /api/extensions/document
         - title: HardBreak