Ensure UV for Python Package Management

[johnson2500]

rh-qs-scaffold created pyproject.toml files. When running the implementation skill, it does not use uv for package management and Python virtual environment (.venv)

cd /tmp/vllm-semantic-router/packages/api && pip install -e ".[test]" -q 2>&1 | tail -5)
  ⎿  (eval):1: command not found: pip

cd /tmp/vllm-semantic-router/packages/api && pip3 install -e ".[test]" -q 2>&1 | tail -5

cd /tmp/vllm-semantic-router/packages/api && python3 -m venv .venv && .venv/bin/pip install -e ".[test]" -q 2>&1 | tail -3

Originally posted by @Hadar301 in #1