arch add small 3rd party libs to lvgl (#2569)

* move png, sjpg, bmp, gif, fs_if to extra/libs

* reorganize the examples

* update lv_conf_internal.h

* fix warnings

* add freetype

* remove unused assets

* add the new libs to build tests

* update the docs

examples/libs/qrcode/index.rst

@@ -0,0 +1,6 @@
+Create a QR Code
+"""""""""""""""""""""""""""""""""""""""""""""""
+
+.. lv_example:: libs/bmp/lv_example_qrcode_1
+  :language: c
+

examples/libs/qrcode/lv_example_qrcode.h

@@ -0,0 +1,38 @@
+/**
+ * @file lv_example_qrcode.h
+ *
+ */
+
+#ifndef LV_EXAMPLE_QRCODE_H
+#define LV_EXAMPLE_QRCODE_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*********************
+ *      INCLUDES
+ *********************/
+
+/*********************
+ *      DEFINES
+ *********************/
+
+/**********************
+ *      TYPEDEFS
+ **********************/
+
+/**********************
+ * GLOBAL PROTOTYPES
+ **********************/
+void lv_example_qrcode_1(void);
+
+/**********************
+ *      MACROS
+ **********************/
+
+#ifdef __cplusplus
+} /*extern "C"*/
+#endif
+
+#endif /*LV_EXAMPLE_QRCODE_H*/

examples/libs/qrcode/lv_example_qrcode_1.c

@@ -0,0 +1,32 @@
+#include "../../lv_examples.h"
+#if LV_USE_QRCODE && LV_BUILD_EXAMPLES
+
+/**
+ * Create a QR Code
+ */
+void lv_example_qrcode_1(void)
+{
+    lv_color_t bg_color = lv_palette_lighten(LV_PALETTE_LIGHT_BLUE, 5);
+    lv_color_t fg_color = lv_palette_darken(LV_PALETTE_BLUE, 4);
+
+    lv_obj_t * qr = lv_qrcode_create(lv_scr_act(), 150, fg_color, bg_color);
+
+    /*Set data*/
+    const char * data = "https://lvgl.io";
+    lv_qrcode_update(qr, data, strlen(data));
+    lv_obj_center(qr);
+
+    /*Add a border with bg_color*/
+    lv_obj_set_style_border_color(qr, bg_color, 0);
+    lv_obj_set_style_border_width(qr, 5, 0);
+}
+
+#endif
+
+
+
+
+
+
+
+