chore: update ci workflows

this adds a proper release workflow (that I already know) and a test
workflow that installs and uses pytest

.github/workflows/tests.yml

@@ -0,0 +1,32 @@
+name: Tests
+
+on:
+    pull_request:
+        branches:
+            - "**"
+    push:
+        branches:
+            - "**"
+
+jobs:
+    test:
+        runs-on: ubuntu-latest
+        strategy:
+            matrix:
+                python-version: ["3.10"]
+
+        steps:
+            - uses: actions/checkout@v3
+
+            - name: Set up Python ${{ matrix.python-version }}
+              uses: actions/setup-python@v4
+              with:
+                  python-version: ${{ matrix.python-version }}
+
+            - name: Install
+              run: |
+                  pip install -e .
+
+            - name: Run tests
+              run: |
+                  pytest