feat(windows-drivers): vendor wdk 0.5.1 + add ApiSubset::Iddcx (M1 spike)

Vendor the published, self-contained windows-drivers-rs 0.5.1 crates
(wdk-build, wdk-sys) under vendor/ and add a first-class ApiSubset::Iddcx that
bindgens iddcx/1.10/IddCx.h in an extra pass reusing bindgen::Builder::wdk_default
(allowlist_file (?i).*iddcx.* — emits only IddCx items; WDF/DXGI types resolve to
the shared base/wdf bindings, type-identity by construction). Mirrors the existing
gpio/hid/spb subsets exactly: wdk-build gets the enum variant + iddcx_headers()
(UMDF-only), wdk-sys gets generate_iddcx + the iddcx feature + pub mod iddcx.
[patch.crates-io] redirects all wdk-sys/wdk-build (incl. wdk 0.4.1 transitive) to
the patched copies. wdk-probe enables the iddcx feature.

MAKE-OR-BREAK: does IddCx.h bindgen in wdk-sys config without a header conflict
(issue #515) + does the generated module compile (type-identity)? CI answers it.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

packaging/windows/drivers/Cargo.lock

@@ -716,8 +716,6 @@ dependencies = [
 [[package]]
 name = "wdk-build"
 version = "0.5.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2c150122a579af759770b354064cd2994d29e97525d904f65ff1412ad5122766"
 dependencies = [
  "anyhow",
  "bindgen",
@@ -767,8 +765,6 @@ dependencies = [
 [[package]]
 name = "wdk-sys"
 version = "0.5.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5e13e19ed97609bc1d1236806019309ca2d47aaad6d3217ab374e73c9ff3b8a9"
 dependencies = [
  "anyhow",
  "bindgen",