feat(tools/magrathea): add repl command r/4199

`mg repl` is essentially a shortcut for nix repl $(mg path //) which
comes up often enough for me. Launching a repl only really makes sense
in the repository root with how readTree works at the moment, so I think
this is a convenient addition.

Change-Id: I32b695885c2e6eaecdcc656c7249afa504439913
Reviewed-on: https://cl.tvl.fyi/c/depot/+/5822
Autosubmit: sterni <sternenseemann@systemli.org>
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI

0 files changed, 0 insertions, 0 deletions