Add man page

Produces a man page that looks like this: ![Screenshot of the man page](https://i.imgur.com/48p2TVz.png).

When kiwi is installed globally (`npm -g install`) this man page will be installed in `/usr/share/man/man1/kiwiirc.1` and will display when the command `man kiwiirc` is executed.

Alternatively, one could execute `man -l ./man/kiwiirc.1` to get the same result if Kiwi is installed non-globally.