move UART bridge -> tutorials

tutorials/http/uart-bridge/main.c

@@ -0,0 +1,18 @@
+// Copyright (c) 2022 Cesanta Software Limited
+// All rights reserved
+
+#include "mongoose.h"
+const char *s_listening_url = "http://0.0.0.0:8000";
+
+void uart_bridge_fn(struct mg_connection *, int, void *);
+
+int main(void) {
+  struct mg_mgr mgr;
+  mg_log_set(MG_LL_DEBUG);
+  mg_mgr_init(&mgr);
+  mg_http_listen(&mgr, s_listening_url, uart_bridge_fn, &mgr);
+  MG_INFO(("Listening on %s", s_listening_url));
+  while (mgr.conns != NULL) mg_mgr_poll(&mgr, 500);
+  mg_mgr_free(&mgr);
+  return 0;
+}