增加ROMFS，FATFS和未来的LittleFS将挂载在ROMFS上
初步增加littlefs文件系统，尚未完全实现一键化配置

* [lvgl] PKG_USING_LV_MUSIC_DEMO defaults by yes

* [lvgl] remove specific suppport for imxrt1060
https://github.com/lvgl/lvgl/pull/3566

因为不确定后续IAR是否会像Keil一样内含有不同的编译工具链
此外，将判断条件改为列表方式，这样更方便后续增加其他可能的IAR编译链

* [lvgl] 代码精炼

* delet lv_port_indev.c

* Update Kconfig

* [gcc][armcc][armclang] rtconfig.CROSS_TOOL->rtconfig.PLATFORM

* [stm32f401-nucleo] arduino support
* 增加application arduino main文件
* 调整目录结构

[stm32f072] support Arduino I2C and update readme

- add comments
- remove ARDUINO_PWM_HZ
- remove initVariant blank function
- support DAC0
- improve Kconfig of STM32L475 PANDORA
- add readme
- add i2c1 bus device

* [stm32 pandora] fix the bug when using LCD demo

* arduino 增加内部温度传感器和参考电压通道

* remove ARDUINO_PINOUT_PWM_MAX

* [update] add fal component.

* [update] format code.

* [update] change PKG_USING_FAL to RT_USING_FAL

* [update] format code.

* [update] fal

* [update] delete FAL_SW_VERSION

* [stm32][nucleo-f072] add arduino gpio support

* 完善stm32f401nucleo的基本配置

* 修改led引脚描述

* 潘多拉增加arduino引脚别名

* [ARDUINO]STM32L072RB 增加ADC A0-A5的引脚配置

* add pwm

* [Arduino][stm32l475] enable i2c bus device

* 增加默认i2c总线设备名称

- 删除啰嗦的代码
related: https://github.com/RT-Thread/rt-thread/issues/3046