Add a CI job for build testing

.github/workflows/build-test.yaml

@@ -0,0 +1,24 @@
+name: Build test
+on:
+  push:
+    branches: [ "*" ]
+  pull_request:
+    branches: [ "*" ]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+    steps:
+      - name: Install Dependencies
+        shell: bash
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y cmake build-essential libfmt-dev yosys
+      - uses: YosysHQ/setup-oss-cad-suite@v3
+      - uses: actions/checkout@v3
+        with:
+          submodules: 'recursive'
+          fetch-depth: 0
+      - run: |
+          TARGET=build/slang.so ./build.sh