Revamp Xiudi XD60

[dunk2k]

Description

Rework (VIA) json of named keyboard to better reflect it's multi-layout capability.

QMK Pull Request

Checklist

• [x] The VIA support for this keyboard is MERGED in QMK master already (MANDATORY)
• [x] The VIA definition follows the guide here: https://caniusevia.com/docs/layouts
• [x] I have a V3 JSON version for this keyboard definition.(MANDATORY)
• [x] I have formatted the JSON file to have consistent formatting with the rest of the repository.
• [x] I have tested this keyboard definition using VIA's "Design" tab.
• [ ] I have tested this keyboard definition with firmware on a device.
• [x] I have assigned alpha keys and modifier keys with the correct colors.
• [x] The Vendor ID is not 0xFEED

[Xelus22]

I feel like grouping the entire row4 and row5 each is better than separating them out into their own left/right "sides"