feat: Full Text Search Support (#3904)

* Full Text Support

* invalid input test

* Support for sort

* index exist test

* clean up

* better error messaging

* postgres support

* error instructions for $diacritic and $case sensitivity

* nit

* nit

* nit

* separate test for full text

src/Adapters/Storage/Mongo/MongoStorageAdapter.js

@@ -393,6 +393,11 @@ export class MongoStorageAdapter {
   performInitialization() {
     return Promise.resolve();
   }
+
+  createIndex(className, index) {
+    return this._adaptiveCollection(className)
+    .then(collection => collection._mongoCollection.createIndex(index));
+  }
 }
 
 export default MongoStorageAdapter;