feat: add service uninstall functionality and improve service operation flow

src/services/cmds.ts

@@ -131,6 +131,14 @@ export async function changeClashCore(clashCore: string) {
   return invoke<string | null>("change_clash_core", { clashCore });
 }
 
+export async function startCore() {
+  return invoke<void>("start_core");
+}
+
+export async function stopCore() {
+  return invoke<void>("stop_core");
+}
+
 export async function restartCore() {
   return invoke<void>("restart_core");
 }