Implement data types for CLI

Only data types, no CLI parser yet. The data types should represent the following commands:

1. `croco sync [FILE_NAMES]`: update files in every repo
2. `croco labels`: apply all label rules

See an example of data types in `summoner`:

* https://github.com/kowainik/summoner/blob/ef15f4911c701e40dfe35f9e27ad14c96c228710/summoner-cli/src/Summoner/CLI.hs#L206-L213

Think of possible options that can be applied to every command.

Start with the referenced Summoner CLI.hs example, especially lines 206-213, and inspect crocodealer's existing entry points for where CLI data types belong. Define types for the sync and labels commands, including options shared by both; done means the command data is represented without implementing a parser.

Written by the indexing model from the issue text.