arch(img_decoder): replace read_liine_c with get_area_cb

also remove sjpeg support as get_area_cb can de quite same (some optimization is still needed to not decode the out of bounds chunks)

examples/libs/sjpg/lv_example_sjpg_1.c

@@ -8,10 +8,14 @@ void lv_example_sjpg_1(void)
 {
     lv_obj_t * wp;
 
+    LV_IMAGE_DECLARE(codeblocks)
+
     wp = lv_image_create(lv_scr_act());
     /* Assuming a File system is attached to letter 'A'
      * E.g. set LV_USE_FS_STDIO 'A' in lv_conf.h */
-    lv_image_set_src(wp, "A:lvgl/examples/libs/sjpg/small_image.sjpg");
+    lv_image_set_src(wp, "A:codeblocks.jpg");
+    //    lv_image_set_src(wp, &codeblocks);
+    lv_obj_center(wp);
 }
 
 #endif