Add GHA for 'make test'

Author: tstromberg

.github/workflows/test.yml

@@ -0,0 +1,30 @@
+name: Test
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  test:
+    name: Run tests
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Check out code
+      uses: actions/checkout@v4
+
+    - name: Set up Go
+      uses: actions/setup-go@v5
+      with:
+        go-version-file: 'go.mod'
+
+    - name: Run tests
+      run: make test
+
+    - name: Upload coverage
+      uses: codecov/codecov-action@v4
+      if: success()
+      with:
+        fail_ci_if_error: false