Support for Corsair Keyboard G-Keys as Input Device

Describe the feature idea

Support for Corsair keyboard G-keys (e.g. K95, K70 RGB Pro) as input triggers, so G-key presses can be mapped to StreamController actions/pages - similar to how physical Stream Deck buttons work. On Linux these could be sourced via ckb-next's DBus/socket interface. This would let users without dedicated Stream Deck hardware use G-keys as an extra set of programmable buttons.