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

Provider/main/lodepng_alloc.hpp

@@ -0,0 +1,14 @@
+#ifndef LODEPNG_ALLOC_HPP
+#define LODEPNG_ALLOC_HPP
+
+#include <stddef.h>
+
+void lodepng_allocator_init();
+void lodepng_allocator_reset();
+void lodepng_allocator_free();
+
+void* lodepng_custom_malloc(size_t size);
+void* lodepng_custom_realloc(void* ptr, size_t new_size);
+void lodepng_custom_free(void* ptr);
+
+#endif // LODEPNG_ALLOC_HPP