fix: shellexpand final path in pick_search_path

[satoqz]

The clone-repo and init-repo commands do not shell expand the search path they pick from the configuration via pick_search_path.

For example, my configuration is:

[[search_dirs]]
path = "~/src"

and below command:

tms clone-repo https://github.com/repo/repo

would result in the repo being cloned to $PWD/~/src/repo rather than /home/user/src/repo.

I'm assuming only the final search path that is picked in pick_search_path should be expanded such that the interactive picker still shows the unexpanded, easier to read paths first.

[jrmoulton]

Thanks!