Add clj-kondo config

[aroemers]

Proposal for #1

[piranha]

Wow this is way more efficient than what I did; I need to try this out, but I suspect you already did? 😁

[aroemers]

... but I suspect you already did?

I linted this project itself, which validated the states and defstates in the tests. I don't have access to a project using redelay currently. So, if you have, validating this change will certainly help!

[piranha]

One thing that's lacking is that jar does not include clj-kondo config in the correct path, see clj-kondo docs on that.

For an example, look at better-cond.