feat(lcd): migrate driver to platform and replace jpg demo with png

components/platform/internal/display_lcd_decode_image.h

@@ -0,0 +1,12 @@
+#pragma once
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "esp_err.h"
+
+esp_err_t platform_lcd_decode_demo_png(uint16_t **out_pixels,
+                                       uint16_t *out_width,
+                                       uint16_t *out_height,
+                                       char *err,
+                                       size_t err_len);