Made some changes to the comment system

Changed to be rendered server side along with page content.
Changed deletion to fully delete comments from the database.
Added 'local_id' to comments for referencing.
Updated reply system to be non-nested (Incomplete)
Made database comment format entity-agnostic to be more future proof.
Updated designs of comment sections.

resources/assets/js/components/index.js

@@ -10,6 +10,7 @@ let componentMapping = {
     'entity-selector': require('./entity-selector'),
     'sidebar': require('./sidebar'),
     'page-picker': require('./page-picker'),
+    'page-comments': require('./page-comments'),
 };
 
 window.components = {};