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

libs/lvgl/scripts/lv_conf_internal_gen.py

@@ -17,7 +17,7 @@ if sys.version_info < (3,6,0):
   exit(1)
 
 fin = open(LV_CONF_TEMPLATE)
-fout = open(LV_CONF_INTERNAL, "w")
+fout = open(LV_CONF_INTERNAL, "w", newline='')
 
 fout.write(
 '''/**
@@ -30,7 +30,25 @@ fout.write(
 #define LV_CONF_INTERNAL_H
 /* clang-format off */
 
-#include <stdint.h>
+/*Config options*/
+#define LV_OS_NONE          0
+#define LV_OS_PTHREAD       1
+#define LV_OS_FREERTOS      2
+#define LV_OS_CMSIS_RTOS2   3
+#define LV_OS_RTTHREAD      4
+#define LV_OS_WINDOWS       5
+#define LV_OS_CUSTOM        255
+
+#define LV_STDLIB_BUILTIN           0
+#define LV_STDLIB_CLIB              1
+#define LV_STDLIB_MICROPYTHON       2
+#define LV_STDLIB_RTTHREAD          3
+#define LV_STDLIB_CUSTOM            255
+
+#define LV_DRAW_SW_ASM_NONE         0
+#define LV_DRAW_SW_ASM_NEON         1
+#define LV_DRAW_SW_ASM_HELIUM       2
+#define LV_DRAW_SW_ASM_CUSTOM       255
 
 /* Handle special Kconfig options */
 #ifndef LV_KCONFIG_IGNORE
@@ -150,11 +168,14 @@ fout.write(
  * End of parsing lv_conf_template.h
  -----------------------------------*/
 
+#ifndef __ASSEMBLY__
 LV_EXPORT_CONST_INT(LV_DPI_DEF);
+LV_EXPORT_CONST_INT(LV_DRAW_BUF_STRIDE_ALIGN);
+LV_EXPORT_CONST_INT(LV_DRAW_BUF_ALIGN);
+#endif
 
 #undef _LV_KCONFIG_PRESENT
 
-
 /*Set some defines if a dependency is disabled*/
 #if LV_USE_LOG == 0
     #define LV_LOG_LEVEL            LV_LOG_LEVEL_NONE