Fix BSP bugs:
-Added Touch INT GPIO Init code to pin_mux.c
-Added new delay code for touch/video driver, using the rt-thread delay, in touchpad.c/.h

* 添加 imxrt1060-evk BSP

* add LVGL

* add README.md

* Delete irrelevant files

* Modify the optimization level to O1

* Organize documents

* Source code formatting