Auto annotate all Tanjun commands and other decorator shortcuts

[pmdevita]

Since atsume officially recommends using type annotations for commands, it may be useful to add a shortcut to avoid having to add the @tanjun.annotated.with_annotated_args(follow_wrapped=True) decorator to every command. This could be configured per component via its ComponentConfig.

It might also be interesting to have a shortcut decorator to configure both a slash and a message command in one line.