Add Manibus VIA Support

[SamuraiKek]

Description

Add Manibus keyboard VIA support

QMK Pull Request

qmk/qmk_firmware#20497

Checklist

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

[Xelus22]

Please remove the V2 definition (under src/ folder) as that is only for legacy boards.

[Xelus22]

Is this correct? the mods/accents? it doesn't seem right to me. just making sure

[SamuraiKek]

Is this correct? the mods/accents? it doesn't seem right to me. just making sure

Sorry for the late reply, I kinda forgot this PR was still open. Yes, the mods/accents are correct. I've also removed the v2 definition.