IJ Terminal does not automatically `hash -r` on new package installation

If there is a binary for a package in the user's path before `hermit install ` it will still take precedence in the user's IJ Terminal until `hash -r` is run manually.

We should revisit if there is a way of injecting hermit activation scripts to the Terminal

No file or test is named. Start by tracing how the IJ Terminal handles Hermit activation and how `hermit install ` affects the shell environment; done means a newly installed package takes precedence without manually running `hash -r`.

Written by the indexing model from the issue text.