Expose `deps` separately, add a direnv with PATH_add for it to bring
tooling into $PATH.
Change-Id: I432cd2b082cad89e08bef78dc4653e10e137cd6b
Reviewed-on: https://cl.tvl.fyi/c/depot/+/9842
Reviewed-by: flokli <flokli@flokli.de>
Autosubmit: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI