Add Verilator build as action

.github/workflows/verilator.yml

@@ -0,0 +1,24 @@
+name: Verilator
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Install dependencies
+      run: |
+        sudo apt install verilator libelf-dev
+        pip install -r python-requirements.txt
+
+    - name: Build simulator
+      run: |
+        fusesoc --cores-root=. run --target=sim --tool=verilator --setup --build lowrisc:sonata:system --verilator_options="+define+RVFI"
+