add all mode and quiet mode

[tbillington]

This PR adds 2 new arguments to the kondo command line tool. Inspired by this issue #52.

-a/--all flag will clean all projects found in the directories specified without prompting the user.

-q/--quiet flag will cause kondo to only print the totals at the conclusion of the run. Supplying quiet twice will silence all output. The quiet flag is only available when the all flag (above) is also supplied.

3 examples of the flags using kondo against it's own project directory.

> ./kondoc -a
/Users/choc/code/kondo Cargo project
  └─ target (428.6MiB)
  deleted 428.6MiB

Projects cleaned 1, Bytes deleted: 428.6MiB
>

> ./kondoc -a -q
Projects cleaned: 1, Bytes deleted: 280.1MiB
>

> ./kondoc -a -qq
>