Switch to 2.0 branch (#1152)

* Adapt boards to v2 partition tables

* fix esp log error

* fix display style

* reset emotion after download assets

* fix compiling

* update assets default url

* Add user only tools

* Add image cache

* smaller cache and buffer, more heap

* use MAIN_EVENT_CLOCK_TICK to avoid audio glitches

* bump to 2.0.0

* fix compiling errors

---------

Co-authored-by: Xiaoxia <terrence.huang@tenclass.com>

main/boards/common/board.h

@@ -11,6 +11,8 @@
 #include "led/led.h"
 #include "backlight.h"
 #include "camera.h"
+#include "assets.h"
+
 
 void* create_board();
 class AudioCodec;
@@ -46,10 +48,11 @@ public:
     virtual void StartNetwork() = 0;
     virtual const char* GetNetworkStateIcon() = 0;
     virtual bool GetBatteryLevel(int &level, bool& charging, bool& discharging);
-    virtual std::string GetJson();
+    virtual std::string GetSystemInfoJson();
     virtual void SetPowerSaveMode(bool enabled) = 0;
     virtual std::string GetBoardJson() = 0;
     virtual std::string GetDeviceStatusJson() = 0;
+    virtual Assets* GetAssets();
 };
 
 #define DECLARE_BOARD(BOARD_CLASS_NAME) \