fix: create venv before installing dependencies in CI

Author: mariuspruvot

.github/workflows/ci.yml

@@ -25,8 +25,11 @@ jobs:
       - name: Set up Python ${{ matrix.python-version }}
         run: uv python install ${{ matrix.python-version }}
 
+      - name: Create virtual environment
+        run: uv venv --python ${{ matrix.python-version }}
+
       - name: Install dependencies
-        run: uv pip install --system -e ".[dev]"
+        run: uv pip install -e ".[dev]"
 
       - name: Run type checking
         run: uv run poe type