added a setting to change the proxy mode controlled by a switch on the homepage

src/services/types.d.ts

@@ -748,6 +748,7 @@ interface IVergeConfig {
   enable_system_proxy?: boolean;
   enable_global_hotkey?: boolean;
   enable_dns_settings?: boolean;
+  primary_action?: "tun-mode" | "system-proxy";
   proxy_auto_config?: boolean;
   pac_file_content?: string;
   proxy_host?: string;