Problem description

There are env vars PIXI_LOCKED and PIXI_FROZEN, but none for --no-install cli param.

I want to set up a pixi env that is read-only for consumers. They should run pixi shell --as-is, but what would be more convenient is to setup an .envrc that sets PIXI_FROZEN=true and PIXI_NOINSTALL=true so that they won't attempt any operations that require write access.