Add Moondrop Dash75

[vinorodrigues]

Description

Add the Moondrop Dash75 - an innovative 75% keyboard with integrated USB Hub and headphone DAC/Amp

QMK Pull Request

• [Keyboard] Add Moondrop Dash75 qmk/qmk_firmware#20890

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]

Looks like tab and backspace are not coloured correctly