Re-organize internals to make typedoc happy

Author: NullVoxPopuli

docs-app/public/docs/3-ui/rating.md

@@ -348,7 +348,7 @@ import { ComponentSignature } from 'kolay';
 <template>
   <ComponentSignature 
     @package="ember-primitives" 
-    @module="declarations/components/rating" 
+    @module="declarations/components/rating/rating" 
     @name="Rating" />
 </template>
 ```

ember-primitives/src/components/rating.gts

@@ -1,4 +1,4 @@
-export { Rating } from "./rating/index.gts";
+export { Rating } from "./rating/rating.gts";
 
 import type { ComponentIcons } from "./rating/public-types.ts";