Added lvgl support to generate images. Made basic example, grayscale background + text displayed everytime we call /api/display/image.png

Provider/main/lv_setup.hpp

@@ -0,0 +1,11 @@
+#pragma once
+
+#include "freertos/FreeRTOS.h"
+#include "freertos/semphr.h"
+#include "lvgl.h"
+
+extern SemaphoreHandle_t g_LvglMutex;
+extern lv_display_t *g_LvglDisplay;
+extern uint8_t *g_LvglDrawBuffer;
+
+void setup_lvgl();