This PR is part of porting all old scripts #221 and includes a set of
modules:
- fuzzy -> `modules/fuzzy/fuzzy_command_search.nu`
- ls-mods -> `modules/ls-mods`: `ls-less.nu`, `ls-wide.nu` and
`ls-wide-with-color.nu`
- nu_101 -> `modules/nu_101`: `nothing.nu` and `inner_outer_loop.nu`
Edit: `fuzzy` and `nu_101` have been moved to `sourced`
