fixed type mismatches and callback handling in server register event

shared-types/types/types/index.d.ts

@@ -1,7 +1,11 @@
 declare module 'rage-fw-shared-types' {
-    export interface RageFW_ICustomServerEvent {}
+    export interface RageFW_ICustomServerEvent {
+        test(test: string): void
+    }
 
-    export interface RageFW_ICustomClientEvent {}
+    export interface RageFW_ICustomClientEvent {
+        test(test: string): void
+    }
 
     export interface RageFW_ICustomCefEvent {
         test(test: string): void