feat: implement GEWU service and local agent workflows

scripts/python-tool

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+if command -v uv >/dev/null 2>&1; then
+  exec uv run "$@"
+fi
+
+python_bin=".venv/bin/python"
+if [[ ! -x "$python_bin" ]]; then
+  python3 -m venv .venv
+fi
+
+if ! "$python_bin" -m pip --version >/dev/null 2>&1; then
+  "$python_bin" -m ensurepip --upgrade
+fi
+
+marker=".venv/.gewu-dev-installed"
+if [[ ! -f "$marker" ]]; then
+  "$python_bin" -m pip install --disable-pip-version-check -e '.[dev]'
+  touch "$marker"
+fi
+
+tool="$1"
+shift
+exec ".venv/bin/$tool" "$@"