Implement calling GetFood from FE

frontend/wailsjs/go/main/App.d.ts

@@ -1,6 +1,5 @@
 // Cynhyrchwyd y ffeil hon yn awtomatig. PEIDIWCH Â MODIWL
 // This file is automatically generated. DO NOT EDIT
+import {main} from '../models';
 
-export function Foo():Promise<string>;
-
-export function Greet(arg1:string):Promise<string>;
+export function GetFood():Promise<Array<main.Food>>;