[JSDoc] Add annotations

Bulk-add JSDoc annotations, WTD-1482.

platform/framework/src/register/CustomRegistrars.js

@@ -33,6 +33,7 @@ define(
          * Handles registration of a few specific extension types that are
          * understood natively by Angular. This includes services and
          * directives.
+         * @memberof platform/framework
          * @constructor
          */
         function CustomRegistrars(app, $log) {
@@ -164,4 +165,4 @@ define(
 
         return CustomRegistrars;
     }
-);
+);