proxied fetch support

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

@@ -32,6 +32,8 @@ export function GetAbsPath(arg1:string):Promise<string>;
 
 export function GetPlatform():Promise<string>;
 
+export function GetProxyPort():Promise<number>;
+
 export function GetPyError():Promise<string>;
 
 export function InstallPyDep(arg1:string,arg2:boolean):Promise<string>;

frontend/wailsjs/go/backend_golang/App.js

@@ -62,6 +62,10 @@ export function GetPlatform() {
   return window['go']['backend_golang']['App']['GetPlatform']();
 }
 
+export function GetProxyPort() {
+  return window['go']['backend_golang']['App']['GetProxyPort']();
+}
+
 export function GetPyError() {
   return window['go']['backend_golang']['App']['GetPyError']();
 }