feat(devices): K200L printer driver — live cover/paper status from the J-Speed LAN board

The park-buzi printer is a K200L (Xprinter/ICS XP-K200L; its LAN board and USB
descriptor call it "POS-80"). Its board serves the Rongta's five-row status table
under /prt_status.htm — but the reply carries no HTTP status line or headers, which
node:http rejects, so the Rongta driver could never read it and the unit was filed
in July as "no status page → generic driver" (reachability only).

New `k200l` driver (printer-k200l.ts): prints through the generic ESC/POS device
(same bytes, TCP 9100 or usblp) and reads the page over a raw socket, tolerant of
both the headerless and a proper HTTP reply. Mapping mirrors the Rongta: board
unreachable → offline; page not understood → degraded, never ready; any fault →
degraded naming it; USB → reachability floor. The Rongta driver is untouched.
Tests replay the captured headerless page (devices suite 76). Live against the
lab unit: ready; with the cover open the board reports cover open, paper out,
off-line.

Wiki: new k200l-printer entity (names, network setup from factory
192.168.123.100, board quirks, status page, what it means for park-buzi — over
USB the app never saw cover/paper state at all), cross-links on the Rongta,
status-monitoring, USB-transport and WSL-networking pages (parking-net pinned to
eth1 while the LAN NIC is eth0), index.

Claude-Session: https://claude.ai/code/session_01FWncR69HgGPuei1dLrW3cU

packages/devices/src/drivers/printer-generic.ts

@@ -37,6 +37,8 @@ import {
 // local usblp char device (/dev/usb/lp0); TCP writes to the raw print socket. This
 // clone family is the natural USB candidate — reachability-only, no page to lose.
 //
+// (The K200L / XP-K200L is the exception: its LAN board DOES serve a status page,
+// /prt_status.htm — use the `k200l` driver for it over TCP; see printer-k200l.ts.)
 // Therefore this driver deliberately does NOT implement MonitorableDevice
 // (no readStatus). The device monitor then falls back to the generic
 // `healthCheck()` — a plain TCP reachability PING of the print socket. So the