feat(ksnake): add X11 driver draft (VID 0xA8A4/0xA8A5 PID 0x2255)

[yanhenrique-dev]

Draft driver for K-snake X11.

Protocol reverse-engineered from vendor WebHID panel https://x1a11.yjx2012.com/ (Next.js page chunk):

• Transport: sendReport(0, 64B starting 0x55) + queued inputreport reply. Control collection 0xFF01:0x10.
• VIDs 0xA8A4 (USB, reports USB) / 0xA8A5 (2.4G dongle), PID 0x2255.
• Commands: getVersion [0x55,0x03] (ASCII at reply[23..25]), getBattery [0x55,0x30,0xA5,0x0B,0x2E...] (pct at [8], charge at [9]), getConfig [0x55,0x0E,0xA5,0x0B,0x2F...] with 6x LE DPI stages at [13..24], reportRate wire+1 at [10], dpiIndex wire+1 at [12], setConfig [0x55,0x0F,0xAE,0x0A,0x2F...].

Hardware evidence so far:

• User HID Diagnostic Report (dongle): 3x USB Receiver VID_A8A5 PARTIAL; first interface Vendor (0xFF01) is the control channel, others FFA5 / FF05+FF06. PARTIAL expected (no feature reports, output-report protocol).

What this PR adds:

• src/ksnake codec (pure, transport-independent) with defaults 800/1200/1600/3200/5000/12000.
• src/drivers/ksnake HID client (readStatus/setDpi/setPollingRate, battery, version).
• vendors filters + registry + MouseStatus brand + package export + index.
• registry.test usage 0x10 coverage.

TODO before merge (needs hardware):

• Confirm polling table order (assumed [125,250,500,1000,2000,4000,8000], default idx 3 = 1000Hz).
• Confirm DPI limits/steps.
• Resolve wakeup/move-light nibble swap (decode low/high vs encode high/low — kept vendor-exact).
• Paste a real getConfig hex reply + setDpi/setPollingRate readback.
• Flip KSNAKE_PRODUCTS verified once exercised.

Checks: npm run check passes (build + tests + pack).