Add an Actions workflow for tests

Author: michaelklishin

.github/workflows/test.yml

@@ -0,0 +1,20 @@
+name: lein all test
+
+on:
+  push:
+    branches:
+      - "main"
+  pull_request:
+    branches:
+      - "main"
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v5
+    - name: Install dependencies
+      run: lein deps
+    - name: Run tests
+      run: lein all test