ci: set up build and release workflows

.github/workflows/build.yml

@@ -0,0 +1,53 @@
+name: Build & Test
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: Cache dependencies
+        uses: Swatinem/rust-cache@v2
+
+      - name: Run tests
+        run: cargo test
+
+  build:
+    name: Build
+    strategy:
+      matrix:
+        include:
+          - os: ubuntu-latest
+            target: x86_64-unknown-linux-gnu
+          # TODO: eventually we'd like to gate certain features
+          # behind target OS, at which point this may be usable.
+          #- os: macos-latest
+          #  target: x86_64-apple-darwin
+          #- os: windows-latest
+          #  target: x86_64-pc-windows-msvc
+
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          targets: ${{ matrix.target }}
+
+      - name: Cache dependencies
+        uses: Swatinem/rust-cache@v2
+
+      - name: Build
+        run: cargo build --release --target ${{ matrix.target }}
+