initial actions attempt

.github/workflows/cmake.yaml

@@ -0,0 +1,27 @@
+---
+name: Native CMake Build
+on: [push]
+jobs:
+  build:
+  runs-on: ubuntu-latest
+  steps:
+    # checkout the code
+    - uses: actions/checkout@v4
+    # setup package dependencies
+    - name: Dependencies
+      run: |
+        sudo apt install libgtest-dev libeigen3-dev nlohmann-json3-dev
+    # configure repo
+    - name: Configure
+      run: |
+        cmake -B ${{github.workspace}}/build
+            -DCMAKE_BUILD_TYPE=Release
+            -DSPARK_DSG_BUILD_TESTS=ON
+            -DSPARK_DSG_BUILD_PYTHON=ON
+            -DSPARK_DSG_BUILD_EXAMPLES=ON
+    # build repo
+    - name: Build
+      run: cmake --build ${{github.workspace}}/build --config Release
+    # run unit tests
+    - name: Test
+      run: ctest -C Release