Run tests on PR, add docs

.github/workflows/tests.yml

@@ -0,0 +1,19 @@
+name: Tests
+
+on:
+  pull_request:
+    branches:
+      - master
+  push:
+    branches:
+      - master
+
+jobs:
+  prove:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install Perl::Critic
+        run: sudo apt-get update && sudo apt-get install -y libperl-critic-perl
+      - name: prove -lr
+        run: prove -lr