Update to LVGL 9.0.0 (#47)

- Updated LVGL from 8.3 to 9.0 (removed example/docs/demo folders)
- Updated esp_lvgl_port  to current status of the `lvgl9` branch on `esp-bsp`: https://github.com/espressif/esp-bsp/tree/lvgl9
- Updated all boards and drivers
- Removed `libs/lv_drivers` subproject as SDL is now supported by LVGL directly (although keyboard input seems broken)
- Updated `libs/lv_screenshot`
- Fixed the way `tt_statusbar` widget works due to behaviour change in LVGL
- Updated other lvgl code

boards/waveshare_s3_touch/touch_i.h

@@ -1,12 +1,12 @@
 #pragma once
 
-#include "hal/lv_hal.h"
+#include "lvgl.h"
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-void ws3t_touch_init(lv_disp_t* display);
+void ws3t_touch_init(lv_display_t* display);
 
 #ifdef __cplusplus
 }