`pkgx uninstall` fails if pantry is not downloaded yet

[felipecrs]

I believe it should download the pantry on the fly.

❯ docker run --rm -it --entrypoint= ghcr.io/felipecrs/devcontainer:2 pkgx uninstall volta
× pantry error pantry not found: /home/devcontainer/.local/share/pkgx/pantry/projects
│
╰─➤ https://docs.pkgx.sh/help/pantry-error