Add CI job that builds artifacts

.github/workflows/ci.yml

@@ -0,0 +1,45 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6.0.2
+
+      - name: Install system dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y clang
+
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          toolchain: "1.89.0"
+          targets: wasm32-wasip1, x86_64-unknown-none
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v6.3.0
+        with:
+          node-version: "lts/*"
+          cache: npm
+
+      - name: Install just
+        uses: extractions/setup-just@v3
+
+      - name: Install cargo-component
+        run: cargo install cargo-component
+
+      - name: Install npm dependencies
+        run: npm install
+
+      - name: Build host and components
+        run: |
+          just build
+          just build-rust-component
+          just build-js-component