added various build artifacts for the tundra dev env

hosts/packages/tundra/src/app.in.vala

@@ -0,0 +1,31 @@
+class App : Astal.Application {
+    public static App instance;
+
+    public override void request (string msg, SocketConnection conn) {
+        print(@"$msg\n");
+        AstalIO.write_sock.begin(conn, "ok");
+    }
+
+    public override void activate () {
+        foreach (var mon in this.monitors)
+            add_window(new Bar(mon));
+
+        apply_css("@STYLE@");
+    }
+
+    public static void main(string[] args) {
+        var instance_name = "vala";
+
+        App.instance = new App() {
+            instance_name = instance_name
+        };
+
+        try {
+            App.instance.acquire_socket();
+            App.instance.run(null);
+        } catch (Error err) {
+            print(AstalIO.send_request(instance_name, string.joinv(" ", args)));
+        }
+    }
+}
+