test(core): organize hardening coverage and CI

.github/workflows/rust-core.yml

@@ -0,0 +1,37 @@
+name: Rust core
+
+on:
+  pull_request:
+    paths:
+      - "Cargo.toml"
+      - "Cargo.lock"
+      - "crates/vnidrop/**"
+      - ".github/workflows/rust-core.yml"
+  push:
+    paths:
+      - "Cargo.toml"
+      - "Cargo.lock"
+      - "crates/vnidrop/**"
+      - ".github/workflows/rust-core.yml"
+
+permissions:
+  contents: read
+
+jobs:
+  quality:
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install Rust quality components
+        run: rustup component add clippy rustfmt
+      - name: Check formatting
+        run: cargo fmt --all -- --check
+      - name: Run strict Clippy
+        run: cargo clippy --workspace --all-targets -- -D warnings
+      - name: Run unit and integration tests
+        run: cargo test --workspace --all-targets
+      - name: Check documentation
+        env:
+          RUSTDOCFLAGS: -D warnings
+        run: cargo doc --workspace --no-deps