Add the mt76::chip class on top of the USB transport: 32-bit register
read/write via vendor requests, register polling, and EFUSE reads with
the kick/control sequence from transport/mt76.c. Expose chip_id() and
mac_address() (with the 62:45:bd fallback).
Verified on hardware: chip ID 0x7612 (MT7612) and MAC address read
from EFUSE.
Co-Authored-By: qwen3.8-27b@q2_k_xl: ported register and EFUSE layer
Add the CMake build for the Swift + C++ macOS port, mirroring the
refix layout: deps/ modules (Platform, Flags, Sanitizers, FindUnity),
per-module static libraries (usb, auth, mt76, gip, hid, api), a Swift
app entry point with a pure C bridge header, and a Unity test suite
behind BUILD_TESTING.
Swift requires the Ninja or Xcode generator; a guard in
CMakeLists.txt rejects anything else.
Co-Authored-By: qwen (qwen/qwen3.8-27b@q2_k_xl): scaffolded CMake build + tests
portersky