add cicd testing workflow

.github/workflows/ci-tests.yml

@@ -0,0 +1,33 @@
+# cicd workflow for running tests with pytest
+# needs to first install pdm, then install torch cpu manually and then install the package
+# then run the tests
+
+name: tests (cpu)
+
+on: [push, pull_request]
+
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Install pdm
+        uses: pdm-project/setup-pdm@v4
+        with:
+          python-version: "3.10"
+          cache: true
+
+      - name: Install torch (CPU)
+        run: |
+          python -m pip install torch  --index-url https://download.pytorch.org/whl/cpu
+
+      - name: Install package (including dev dependencies)
+        run: |
+          pdm install
+          pdm install --dev
+
+      - name: Run tests
+        run: |
+          pdm run pytest