Uv is the definitive package installation tool for Python, so add
support to check for it via the start script.
Signed-off-by: kingbri <8082010+kingbri1@users.noreply.github.com>
Since the full argparser requires pydantic, gate it until all dependencies
are installed.
Also if the venv is deleted, assume that start_options.json is invalid
as well.
Signed-off-by: kingbri <bdashore3@proton.me>
