feat: show multiple options

[privatenumber]

Changes

• Add a CLI interface, which supports --help and --version flags (e.g. aicommmits --help shows a manual on how to use the CLI tool)

• Adds a generate flag that accepts a number of messages to generate. (alicommits --generate 3 for 3 messages) Aliased with g (e.g. alicommits -g 3).

  @Nutlope I had go pick a flag name that didn't collide with any git commit flags. Feel free to rename if you can think of a better one that doesn't overlap with git commit.

Other information

Using cleye will set us up for transparently wrapping git commit so we can later pass down any unknown arguments (e.g. signing commits or even adding files -a).

[Nutlope]

LGTM, feel free to merge after resolving conflicts! I like the generate flag name