feat(snapshot) add API to take snapshot for object (#2353)

* Fix image zooming causes unexpected object size.

Signed-off-by: Xu Xingliang <xuxingliang@xiaomi.com>

* add lv_snapshot_take API.

* fix(img) invalidate size and layout on zoom and angle change

* fix(img) not self-repeating under some zoom level.

* fix(snapshot) fix to keep the original position

* Move various set_px_cb_xx functions to lv_hal_disp.c

* add snapshot API to store image to provided buffer

* minor fixes and refactoring

* Move snapshot source to extra/others/snapshot.

1. Update parameter buff to buf.
2. Add macro to disable lv_snapshot, enabled by default.

* docs(others) add the others folder with snapshot.md

* docs(snapshot) added doc and example for snapshot.

1. Update doc snapshot.md
2. Add example lv_example_snapshot_1 to folder examples/others/snapshot
3. Update lv_conf_template.h and lv_conf_internal.h
4. Remove lv_snapshot.c from lv_misc.mk
5. Add others to index.md

Signed-off-by: Xu Xingliang <xuxingliang@xiaomi.com>

* add micropython example for snapshot

Co-authored-by: Xu Xingliang <xuxingliang@xiaomi.com>
Co-authored-by: Gabor Kiss-Vamosi <kisvegabor@gmail.com>

examples/others/lv_example_others.h

@@ -0,0 +1,37 @@
+/**
+ * @file lv_example_others.h
+ *
+ */
+
+#ifndef LV_EXAMPLE_OTHERS_H
+#define LV_EXAMPLE_OTHERS_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*********************
+ *      INCLUDES
+ *********************/
+#include "snapshot/lv_example_snapshot.h"
+/*********************
+ *      DEFINES
+ *********************/
+
+/**********************
+ *      TYPEDEFS
+ **********************/
+
+/**********************
+ * GLOBAL PROTOTYPES
+ **********************/
+
+/**********************
+ *      MACROS
+ **********************/
+
+#ifdef __cplusplus
+} /*extern "C"*/
+#endif
+
+#endif /*LV_EX_OTHERS_H*/