Add :meow-state keyword for use-package declarations

[Olivia5k]

Add simple keyword :meow-state added to use-package declarations. Used to help populate meow-mode-state-list, as follows:

(use-package sly
  :meow-state ((sly-inspector-mode . motion)
               (sly-db-mode . motion)))

The above would make the sly-inspector and sly-db modes start in Meow's motion state.

Since I know that it's important to the meow project to not have any external dependencies, the meow-use-package module will only be loaded if use-package is installed. I also added a mention in CUSTOMIZATIONS.org, so that it's mentioned somewhere in the documentation. I hope it was the right place to put things.

[DogLooksGood]

Thanks for the contribution.
We have meow-shims.el for all the 3rd party related code.

[Olivia5k]

Oh, that makes sense. I'll move the things there.

[Olivia5k]

@DogLooksGood I've moved the code and removed the other files. I didn't put the loading of this specific code into the meow--enable-shims function, since that doesn't make sense for the context in which use-package is used. use-package keywords need to be added at compile time, otherwise packages using them won't see them.

Does that work?

[DogLooksGood]

Yeah, it looks good to me.

[Olivia5k]

Error: Aliases should start with the package’s prefix "meow".
Error: "use-package-handler/:meow-state" doesn’t start with package’s prefix "meow".
Error: ‘use-package-handler/:meow-state’ contains a non-standard separator ‘/’, use hyphens instead (see Elisp Coding Conventions).

I don't know how to fix those. The alias cannot have the meow prefix, since it's aliasing something outside of meow, and it has to use the / as a separator because that's what use-package uses. What do we do? Can we disable those checks for this code specifically?

EDIT: Doesn't seem like it's possible currently. Not sure how to move forward with this then. 😕

[DogLooksGood]

Let me do some research here :)