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

删除多余注释，另外确定了对于其他型号单片机的适应性

[bsp/stm32] fix the bug of 'can' being stucked when short cricuit the canH and canL, change some wrong annotations

[stm32F4] adapt 168M frequency of 1M can baud, remember to add the define of BSP_USING_CAN168M in kconfig while using 168M frequency

* [stm32] fix h7 uart V2 driver unused code.

* [DeviceDriver][serialv2] fix the serialv2 when using for console device on DMA mode.

* [stm32][art-pi] using serial v2 by default

* [DeviceDriver][SerialV2] Add termios for serial@V2 .

* [BSP][STM32] Add hardware flow control for STM32 serial@V2 driver.

* [DeviceDriver][Serial@V2] Add hardware flow control for serial V2.

* [stm32] fix h7 uart V2 driver unused code.
* [DeviceDriver][serialv2] fix the serialv2 when using for console device on DMA mode.
* [stm32][art-pi] using serial v2 by default

* [stm32][drivers]修复CRC自定义设置不生效的bug

* update format

* [ulog] 解决ulog开启时间戳后与libc time以及rtc驱动相关函数干涉的问题
* ulog：当发生递归输出时，后续递归想要输出的内容可能会因为防范递归的判断而无法输出
因此修改输出规则，在发生递归时，采用简单的，无格式的方式直接输出。这样既保证不会发生递归输出，也可以保证递归输出的部分可以正常输出。
* [ulog] size_t->rt_size_t NULL->RT_NULL

* [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

* add arg for rt_usb_host_init call

* 避免警告，变量可能未初始化就使用

* 避免警告，变量可能未初始化就使用

* 避免警告，变化可能未初始化就使用。

* Update bsp/stm32/libraries/HAL_Drivers/drv_usart.c
Co-authored-by: Nguo <guozhanxin@rt-thread.com>

* Update bsp/stm32/libraries/HAL_Drivers/drv_usart_v2.c
Co-authored-by: Nguo <guozhanxin@rt-thread.com>
Co-authored-by: Nguo <guozhanxin@rt-thread.com>

* [console] 解决在没有定义RT_USING_DEVICE的情况下使用device报错的问题

* format codes

* [libc] 整理格式

* refresh projects

1.使能DMA时钟的条件编译中加入了STM32H7
2.添加STM32H7 "spi_config" 中的request字段
3.DMA初始化FiFo相关的初始化的条件编译选项中加入STM32H7

[bsp/stm32/libraries/HAL_Drivers/drv_wdt.c]: add SOC_SERIES_STM32G0 to use "stm32_wdt.hiwdg.Init.Window = 0x00000FFF", otherwise the watchdog always reset.