add a tlc workflow

.github/workflows/tlc-model-check.yml

@@ -0,0 +1,30 @@
+name: TLA+ Model Checking
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  model_check:
+    runs-on: ubuntu-latest
+
+    steps:
+    # Checkout the repository
+    - name: Checkout code
+      uses: actions/checkout@v3
+
+    # Install Java (TLC requires Java to run)
+    - name: Set up Java
+      uses: actions/setup-java@v3
+      with:
+        java-version: '11'
+
+    # Run the TLA+ Model Checker (TLC)
+    - name: Run TLC model checker
+      run: |
+        wget https://github.com/tlaplus/tlaplus/releases/latest/download/tla2tools.jar
+        java -cp tla2tools.jar tlc2.TLC -deadlock -config p2p.cfg p2p.tla