[WIP] share subcommand

Implement a share command with the following interface:

```
Usage:
      share tv    <name_pattern> <season> <episonde>
      share movie <name_pattern>

    Options:
      -h --help   Show this screen.
```

If the `name_pattern` returns one entry the according file in copied from its source to the share folder.

- [x] argument parsing
- [ ] finding distinct tv show
- [ ] finding distinct movie
- [ ] moving tv shows
- [ ] moving movies