Add device-dashboard/minimal

tutorials/device-dashboard/minimal/main.c

@@ -0,0 +1,18 @@
+// SPDX-FileCopyrightText: 2026 Cesanta Software Limited
+// SPDX-License-Identifier: GPL-2.0-only or commercial
+
+#include "mongoose.h"
+
+int main(void) {
+  struct mg_mgr mgr;
+
+  mg_mgr_init(&mgr);
+  mg_dash_init(&mgr);
+
+  for (;;) {
+    mg_mgr_poll(&mgr, 10);
+    mg_dash_poll(&mgr);
+  }
+
+  return 0;
+}