chore: Try living procedure

Author: ftnext

.github/workflows/on-stage.yaml

@@ -0,0 +1,15 @@
+name: Living procedure
+
+on: [push]
+
+jobs:
+  macos:
+    runs-on: macos-15
+    steps:
+      - name: Install uv
+        run: |
+          curl -LsSf https://astral.sh/uv/install.sh | sh
+          uv --version
+          uvx --version
+      - name: Run flake8-kotoha
+        run: uvx --with flake8-kotoha flake8 --help