Add U8g2 frame into EdgeTX

[NSG-666]

Add Chinese language support for OLED RC (use U8g2 frame), and build a
customized startup page.
This is a video:
https://youtu.be/jKuEs4jtMwg

[raphaelcoeffic]

Add Chinese language support for OLED RC (use U8g2 frame), and build a customised startup page.

Nice! Where is the code?

[NSG-666]

@raphaelcoeffic in order to make hardware debugging more convenient, I move the dev env to cube IDE (i think i will try a way to make a PR later), now it is looks like that:
1、

2、

3、

[raphaelcoeffic]

Thx! Yes, please make a PR so we can assess the code changes. It sound quite fun indeed.