Add a function to the keyboard example to write strings (Not an issue) about ch55xduino

[DeqingSun]

This is a good example, thanks. I do not have have an example to make a macro keyboard because the DataFlash is too small to make a reconfigurable macro keyboard. It was only possible to make a reconfigurable keyboard, and "qmkCompatibleKeyboard" does that.

It would also be better if you can change the comment from Spanish to English.

[DeqingSun]

I'll create a Keyboard_writeString next time I maintain the repo. I need to add it to multiple examples.

[NoNamedCat]

Do you think the Keyboard_writeWord function should be inside USBHIDKeyboard, or is it preferable to keep it separate in a different example?