feat: Implement all Frontend stubs

frontend/src/models/vocab.ts

@@ -4,10 +4,10 @@ export enum ReviewMode {
 };
 
 export enum VocabType {
-    NOMEN,
-    VERB,
-    ADJEKTIV,
-    ADVERB
+    NOMEN = 0,
+    VERB = 1,
+    ADJEKTIV = 2,
+    ADVERB = 3,
 };
 
 export interface INomenData {