Add Nape Pro onboard assignments and orientation on Profiles

[dwei30]

Summary

• Show Nape Pro onboard layers on Profiles: inspect a stored layer, switch the mouse to it, and reload.
• Add a G502-style assignment grid on the open layer for 01 / 02 / 03 / 04 / M1 / M2 plus independent scroll CW/CCW. Changes stage until Apply, then flash sequentially with confirm + re-read.
• Add a per-layer Orientation control (0°–315° in 45° steps) in that same grid; it stages with the remaps.
• Rename Keychron APIs as Nape-only (KeychronNapeLayers, ?preview=keychron-nape). M-series mice should not reuse this UI.

Depends on the mouse-protocol Nape remap/orientation PR. Pin @openmouse/protocol to that commit before merge (or after it lands on main).

Test plan

• ?preview=keychron-nape: Profiles lists layers 0–7, assignments and 90° orientation load without a device
• Wired Nape Pro: open a layer, remap a button, Apply; Launcher (or a re-read) shows the new mapping on that layer only
• Scroll CW and CCW can be set independently
• Change orientation on the active layer, Apply: live heading updates; other layers keep their saved angle
• Change orientation on an inactive layer, Apply, then switch to it: heading follows the saved value
• Unknown firmware codes still show as Custom mapping (preserved)
• After the protocol PR merges, bump @openmouse/protocol off the local path / fork pin

[dwei30]

CI fails until mouse-protocol #29 is merged as this PR needs APIs that are not on protocol main yet.