Add testbench as action

.gitea/workflows/test.yaml

@@ -0,0 +1,27 @@
+name: Run the tests for a working verification of xtcl.
+on: [push]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        os: [ubuntu-20.04]
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v2
+
+    - name: Prepare system
+      run: |
+        apt-get update -qy
+
+    - name: Install dependencies
+      run: |
+        apt-get install -y curl
+        curl https://sh.rustup.rs -sSf | sh -s -- -y
+
+    - name: Run test rule using cargo
+      run: |
+        cargo test