info: adding entries for unmanaged paths

fix set command usage

Print unmanaged repos in separate reduced table

sort unmanaged repos alphabetically

use vcstools to detect scm type

cli: fixing get_info_table

cli: Adding additional line break for additionally-detected repos

Refactor:
- use dedicated function for finding untracked repos (api, testability)
- Only retrieve minimal information about unmanaged repos (performance)
- retrieve url in spawned thread (performance)
- undo some hacks added to other functions (api, testability)