feat: add req handler

handler.ts

@@ -0,0 +1,14 @@
+import { App } from "astal/gtk4";
+import { WINDOW_NAME } from "./widgets/bar";
+
+export const reqHandler = (req: string, res: (res: any) => void) => {
+  switch (req) {
+    case "toggle-bar":
+      const win = App.get_window(WINDOW_NAME);
+      win?.is_visible() ? win.hide() : win?.set_visible(true);
+      break;
+
+    default:
+      res("uknown command");
+  }
+};