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/release.yml

@@ -0,0 +1,24 @@
+on:
+    push:
+        branches:
+            - master
+
+permissions:
+    contents: write
+    pull-requests: write
+
+name: release-please
+
+jobs:
+    release-please:
+        runs-on: ubuntu-latest
+        steps:
+            - uses: googleapis/release-please-action@v4
+              with:
+                  # this assumes that you have created a personal access token
+                  # (PAT) and configured it as a GitHub action secret named
+                  # `MY_RELEASE_PLEASE_TOKEN` (this secret name is not important).
+                  token: ${{ secrets.RELEASE_PLEASE_TOKEN }}
+                  # this is a built-in strategy in release-please, see "Action Inputs"
+                  # for more options
+                  release-type: python