docs(comments): clarify readOnly behavior

Expand the readOnly description to explain that it hides the reply
input and edit action on existing comments, not just prevents new
comments.

Author: caio-pizzol

apps/docs/modules/comments.mdx

@@ -41,7 +41,7 @@ modules: {
 ## Configuration
 
 <ParamField path="modules.comments.readOnly" type="boolean" default="false">
-  View-only mode, prevents new comments
+  View-only mode. Hides the reply input and the edit action on existing comments. Users can still read comments and threads but cannot add, edit, or reply.
 </ParamField>
 
 <ParamField path="modules.comments.allowResolve" type="boolean" default="true">