[envrc] run devbox install to ensure createWrappers is called

[savil]

Summary

Our .envrc today calls shellenv but that doesn't run createWrappers.

If the package's binary may change, then the .envrc environment will not get updated.

How was it tested?

in examples/flakes/php, I did:

1. devbox generate direnv
2. php -m | grep ds which prints ds.
3. edit examples/flakes/php/my-php-flake/flake.nix to remove ds extension
4. re-run php -m | grep ds. This still prints ds.

Now, for the test steps:

• cd out of the direnv
• re-enter the direnv-enabled directory (examples/flakes/php)
• re-run php -m | grep ds.
  BEFORE: This still prints ds.
  AFTER: no ds is printed.

Note, in Step 4, ideally we would not print ds but for that to happen the direnv would need
to check local flake files for changes. Today, it just checks devbox.json for changes.
Not addressing in this PR (workaround: cd out and back in to the directory)

[savil]

Current dependencies on/for this PR:

• main
  • PR [envrc] run devbox install to ensure createWrappers is called #1092 👈

This comment was auto-generated by Graphite.

[mikeland73]

This is definitely ok to merge, but I wonder if we want devbox shellenv --init-hook --ensure-wrappers (once we change create wrappers to ensure) for perf reasons. This hook gets triggered every time the directory opens so even minor (in my case 30ms when cached) latencies can add up.

[savil]

@mikeland86 yeah, that makes sense to me. I agree.

I think its okay to land this since its in the code we generate, and not user-visible .envrc file.