feat(windows): pf-vdisplay — all-Rust IddCx virtual display (replaces SudoVDA)

P1 done: a pure-Rust UMDF2 IddCx driver, drop-in compatible with the host's
existing vdisplay/sudovda.rs control plane (the {e5bcc234} interface + the
SudoVDA IOCTL ABI), so the host drives it unchanged. Validated streaming on
glass at 5120x1440@240 — steady 240 fps, ~2.4 ms encode, clean teardown, full
parity with SudoVDA.

- Vendored wdf-umdf-sys / wdf-umdf bindgen crates (MIT, from virtual-display-rs)
  + the SDK-version build.rs fix that resolves the IddCxStub lib path by the WDK
  version actually containing um\x64\iddcx, not the max base SDK.
- pf-vdisplay crate: entry/callbacks/context/control/monitor/edid/
  swap_chain_processor. Our OWN 128-byte EDID (manufacturer PNK, product
  punktfunk — no SudoVDA bytes), a real swap-chain drain (faithful vdd port,
  required so DWM keeps compositing), the SudoVDA-compatible IOCTL control plane
  (ADD/REMOVE/PING/GET_WATCHDOG/GET_VERSION/SET_RENDER_ADAPTER) + a watchdog that
  tears down orphaned monitors when the host stops pinging.
- deploy-dev.ps1: stage + sign + stampinf (date.time DriverVer) + Inf2Cat +
  install, codifying the "bump DriverVer or pnputil keeps the old binary" gotcha.
- docs/windows-virtual-display-rust-port.md: investigation, the on-glass
  validation, and the two traps that cost time (Session-0 measurement +
  accumulated device-state needing a reboot).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

packaging/windows/vdisplay-driver/pf-vdisplay/src/lib.rs

@@ -0,0 +1,33 @@
+//! pf-vdisplay — punktfunk Windows virtual display (IddCx), in Rust.
+//!
+//! P1: a UMDF2 IddCx virtual display. Adapted from MolotovCherry/virtual-display-rs (MIT) — its
+//! named-pipe IPC + serde mode config is replaced by an in-tree `monitor` model (and, next, the
+//! SudoVDA-compatible IOCTL control plane our host already speaks). Logging goes to
+//! `OutputDebugString` (no `log`-eventlog/`tokio`). See `docs/windows-virtual-display-rust-port.md`.
+#![allow(non_snake_case)]
+
+mod callbacks;
+mod context;
+mod control;
+mod direct_3d_device;
+mod edid;
+mod entry;
+mod helpers;
+mod logger;
+mod monitor;
+mod panic;
+mod swap_chain_processor;
+
+use wdf_umdf_sys::{NTSTATUS, PUNICODE_STRING, PVOID};
+
+// The framework entry point. UMDF's reflector calls this; the `+whole-archive` stub forwards to the
+// `DriverEntry` symbol exported from `entry.rs`.
+#[link(name = "WdfDriverStubUm", kind = "static", modifiers = "+whole-archive")]
+extern "C" {
+    pub fn FxDriverEntryUm(
+        LoaderInterface: PVOID,
+        Context: PVOID,
+        DriverObject: PVOID,
+        RegistryPath: PUNICODE_STRING,
+    ) -> NTSTATUS;
+}