Introduce isInBullshitState() to restart the modem stack quicker when it breaks

components/esp_modem/include/cxx_include/esp_modem_dte.hpp

@@ -151,6 +151,8 @@ public:
      */
     void set_command_callbacks();
 
+    bool isInBullshitState();
+
 protected:
     /**
      * @brief Allows for locking the DTE