Vial Support for KBDfans KBD67 MKII RGB V2.

Run the following command to build the firmware.
```sh
make kbdfans/kbd67/mkiirgb/v2:vial
```

[Combos](https://get.vial.today/changelog/release-0.4.html#combos) and [QMK Settings](https://get.vial.today/changelog/release-0.4.html#qmk-settings) are disabled to save space.