Expose hook files in nixpkgs for declarative sourcing

The directions for the new auto-activation feature https://devenv.sh/auto-activation/ indicate users should add the devenv hook | source to their configuration file.

This certainly works, but in more declarative setups like home-manager or nixos the extra invocation of devenv to pipe to source is unnecessary.

Request

Could the hook shell scripts be exposed in the package's share like the current completion files are now, so that they can be sourced directly without needing to run devenv hook fish | source?

Some related context

Home-Manager exposes a function (lib.hm.shell.mkFishIntegrationOption which is a wrapper around mkShellIntegrationOption which is an example of this declarative style.

Of note, the direnv version of this actually just adds pkg hook fish | source, so there's precedent for the | source method, though I'd prefer to just use the file directly unless it's interpolated some way that is necessary by devenv.