add action for CI unit tests

.github/workflows/ci.yaml

@@ -0,0 +1,23 @@
+name: continuous integration
+
+on:
+  push:
+  pull_request:
+    branches:
+      - develop
+      - main
+
+jobs:
+
+  tests-unit:
+
+    runs-on: ubuntu-latest
+    container:
+      image: nrel/openstudio:3.8.0
+
+    steps:
+
+      - uses: actions/checkout@v4
+
+      - name: run
+        run: openstudio classic measure --run_tests measures