feat(sys): add generated vllm.cpp C bindings

.github/workflows/sys.yml

@@ -0,0 +1,41 @@
+name: sys
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+permissions:
+  contents: read
+
+env:
+  CMAKE_BUILD_PARALLEL_LEVEL: "2"
+  CMAKE_GENERATOR: Ninja
+
+jobs:
+  conformance:
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: recursive
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          components: clippy,rustfmt
+      - uses: Swatinem/rust-cache@v2
+      - name: install native tools
+        run: sudo apt-get update && sudo apt-get install --yes binutils build-essential clang cmake jq ninja-build
+      - name: install pinned maintainer tools
+        run: |
+          cargo install bindgen-cli --version 0.72.1 --locked
+          cargo install just --version 1.40.0 --locked
+      - name: check formatting
+        run: just fmt-check
+      - name: lint
+        run: just lint
+      - name: check generated bindings and ffi conformance
+        run: just sys
+      - name: test Linux CPU link modes
+        run: just link-modes
+      - name: test packaged sys crate and downstream fixture
+        run: just package-test