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/vendor/wdk-sys/Cargo.toml

@@ -0,0 +1,119 @@
+# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
+#
+# When uploading crates to the registry Cargo will automatically
+# "normalize" Cargo.toml files for maximal compatibility
+# with all versions of Cargo and also rewrite `path` dependencies
+# to registry (e.g., crates.io) dependencies.
+#
+# If you are reading this file be aware that the original Cargo.toml
+# will likely look very different (and much more reasonable).
+# See Cargo.toml.orig for the original contents.
+
+[package]
+edition = "2024"
+name = "wdk-sys"
+version = "0.5.1"
+build = "build.rs"
+links = "wdk"
+autolib = false
+autobins = false
+autoexamples = false
+autotests = false
+autobenches = false
+description = "Direct bindings to APIs available in the Windows Development Kit (WDK)"
+readme = "README.md"
+keywords = [
+    "wdk",
+    "windows",
+    "wdf",
+    "wdm",
+    "ffi",
+]
+categories = [
+    "external-ffi-bindings",
+    "development-tools::ffi",
+    "os::windows-apis",
+    "os",
+]
+license = "MIT OR Apache-2.0"
+repository = "https://github.com/microsoft/windows-drivers-rs"
+
+[features]
+default = []
+gpio = []
+hid = []
+nightly = [
+    "wdk-macros/nightly",
+    "wdk-build/nightly",
+]
+parallel-ports = ["gpio"]
+spb = []
+storage = []
+test-stubs = []
+usb = []
+iddcx = []
+
+[lib]
+name = "wdk_sys"
+path = "src/lib.rs"
+
+[dependencies.rustversion]
+version = "1.0.20"
+
+[dependencies.wdk-macros]
+version = "=0.5.1"
+
+[build-dependencies.anyhow]
+version = "1.0.97"
+
+[build-dependencies.bindgen]
+version = "0.71.0"
+
+[build-dependencies.cargo_metadata]
+version = "0.19.2"
+
+[build-dependencies.cc]
+version = "1.2.39"
+
+[build-dependencies.cfg-if]
+version = "1.0.3"
+
+[build-dependencies.serde_json]
+version = "1.0"
+
+[build-dependencies.thiserror]
+version = "2.0.12"
+
+[build-dependencies.tracing]
+version = "0.1.40"
+
+[build-dependencies.tracing-subscriber]
+version = "0.3.20"
+features = ["env-filter"]
+
+[build-dependencies.wdk-build]
+version = "0.5.1"
+
+[lints.clippy]
+all = "deny"
+cargo = "warn"
+multiple_unsafe_ops_per_block = "deny"
+nursery = "warn"
+pedantic = "warn"
+undocumented_unsafe_blocks = "deny"
+unnecessary_safety_doc = "forbid"
+
+[lints.rust]
+missing_docs = "warn"
+unsafe_op_in_unsafe_fn = "deny"
+
+[lints.rustdoc]
+bare_urls = "warn"
+broken_intra_doc_links = "warn"
+invalid_codeblock_attributes = "warn"
+invalid_html_tags = "warn"
+invalid_rust_codeblocks = "warn"
+missing_crate_level_docs = "warn"
+private_intra_doc_links = "warn"
+redundant_explicit_links = "warn"
+unescaped_backticks = "warn"