Add __fish_real_command, which walks all PATH matches for a name and
returns the first that is NOT one of this config's generated wrappers
(identified by the "# <name>-wrapper-version:" marker; grep -I treats
real ELF binaries as no-match so only our text shims are skipped). It
never returns one of our own wrappers, so a caller embedding the result
can't build a shim that recurses into itself.
Use it for the fish-deps status "(Found at ...)" path so paru/yay show
the real binary instead of the ~/.local/bin logging shim.
