fix: github workflows use uv

Author: manadart

.flake8

@@ -2,7 +2,7 @@
 max-line-length = 99
 select: E,W,F,C,N
 exclude:
-  venv
+  .venv
   .git
   build
   dist

.github/workflows/ci.yml

@@ -21,13 +21,23 @@ jobs:
 
     - name: Set up Python
       uses: actions/setup-python@v4
+      with:
+        python-version: '3.12'
+
+    - name: Install uv
+      run: pip install uv
+
+    - name: Create uv virtualenv
+      run: uv venv
 
     - name: Install dependencies for testing
       run: |
-        pip install -r requirements-dev.txt
+        source .venv/bin/activate
+        uv pip install ".[dev]"
 
     - name: Run tests
       run: |
+        source .venv/bin/activate
         ./run_tests