chore: create composite setup action and allow more PR titles (#550)

Co-authored-by: Johannes Nussbaum <39048939+jnussbaum@users.noreply.github.com>

.github/actions/preparation/action.yml

@@ -0,0 +1,27 @@
+name: "Preparation"
+description: "Preparation steps to run tests"
+
+runs:
+  using: "composite"
+  steps:
+    - name: Checkout source
+      uses: actions/checkout@v3
+      with:
+        submodules: recursive
+
+    - name: Install poetry
+      shell: bin/bash
+      run: |
+        curl -sSL https://install.python-poetry.org | python3 -
+        poetry self add poetry-exec-plugin
+
+    - name: Set up Python 3.11
+      uses: actions/setup-python@v4
+      with:
+        python-version: 3.11
+        # attempt to restore dependencies from cache (if successful, the following `poetry install` will be a no-op)
+        cache: poetry
+
+    - name: Install Python dependencies
+      shell: bin/bash
+      run: poetry install

.github/workflows/check-pr-title.yml

@@ -15,8 +15,7 @@ jobs:
         with:
           regex: 
             "^[a-z]+(\\([0-9a-z\\-_, ]+\\))?!?: .+\\(DEV-\\d+(, DEV-\\d+)*\\)$|\
-            ^chore: release \\d+\\.\\d+\\.\\d+$|\
-            ^chore\\(deps\\): bump dependencies$"
+            ^chore.*"
             # see here on how to cope with linebreaks in YAML: https://stackoverflow.com/a/21699210/14414188
           allowed_prefixes: "fix,refactor,feat,docs,chore,style,test" 
           disallowed_prefixes: "feature,hotfix"