allow kbd-macros to also be callbacks

[lanceberge]

meow forces you to bind some of the built-ins e.g. meow-next to keyboard macros. This makes it difficult to do rebind things like C-n in meow-normal-state-keymap because it forces you to have something bound to next-line in order to use meow-next. These changes let you additionally bind your meow kbd macros to callback functions so you can do things like:(setq meow--kbd-forward-line #'next-line) and then rebind C-n

Let me know if you'd like to keep these changes and I can document them

Testing

to test this eval the changed buffer and eval (setq meow--kbd-forward-line #'next-line) then you can verify that meow-next works in addition to the other meow functions that use keyboard macros like meow-prev

[eshrh]

Good idea. Please add documentation if you'd like to, or I can merge and do it myself.

[lanceberge]

alright no problem, I just added docs