feat(observer): add observer mode and disconnect recovery

components/maze32_web/include/maze32_gateway.h

@@ -7,7 +7,9 @@
 #include "esp_err.h"
 #include "esp_http_server.h"
 #include "esp_timer.h"
+#include "maze32_game.h"
 #include "maze32_lobby.h"
+#include "maze32_maze.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -42,6 +44,11 @@ typedef struct {
     uint32_t server_sequence;
     unsigned int suggestion_index;
     esp_timer_handle_t countdown_timer;
+    esp_timer_handle_t reconnect_timer;
+    maze32_maze_t maze;
+    maze32_maze_workspace_t maze_workspace;
+    maze32_game_t game;
+    maze32_view_t view;
 } maze32_gateway_t;
 
 esp_err_t maze32_gateway_init(maze32_gateway_t* gateway);