* adds proton c base
* fixes custom matrix include
* adds readme.md
* initial proton coversion, no pin mapping
* start of mcu selection
* add pin mapping and sweet16 test
* add at90 to list
* disable backlight, fix d7
* update flag names
* doc updates
* proton c update for mcu selection
* add zh-cn readme
* edit readme
* Round 1 of edits
- Mandarin translation of QMK products is off, best to use the English name.
- Fix some terminology and grammar.
* trying re-translating the first paragraph
* add fallback langurages
* Create LANGS.md
* Rename docs/zh-cn/README.md to docs/zh/README.md
* Update LANGS.md
* Update index.html
* Delete README.md
* add sidebar for zh
