feat(lf): add skim-based "goto" shortcut
feat(lf): add skim-based "goto" shortcut

Because as pretty as "broot" is, it doesn't cut it for very big
hierarchies (too slow). So I am going to make "gt" (the "default",
because it is easier to type) invoke skim, and "gT" (the "special" mode)
invoke broot.

wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent