Add clj-kondo hook and config for linting defcomponent

[PEZ]

Hej! Thanks for providing Dumdom! I am having a blast with it.

This PR adds configuration for linting the defcomponent macro with clj-kondo. clj-kondo will, upon request, import it and. For people using cljure-lsp, clj-kondo will be requested to do so, and basically thet will not need to do anything but commit the config to their repositories.

In my work project we're currently using an adapted defcomponent macro which lends itself to being linted as defn. The config submitted here improves on that solution by not requiring Dumdom users to include such a macro, offering some help with getting the life-cycle hook keywords right, and generally is less confusing.

It's my first clj-kondo hook and I'm a bit wary that I'm doing something stupid (I often do!), but things behaves nicely with every test I throw at it.

A thing I am not sure I got right is the choice to lint life-cycle hook keywords as warnings. It could be errors as well, but at least I am in the habit of renaming things temporarily to disable some behaviour and then it makes sense with warning. I think users can override this with project local config.

I'm planning to write some more hooks for event code navigation and checking, but I think those will be better served as examples, because they will depend on what particular framework people set up with the global event handle. At least I think it will depend on that, I guess I will know better once I've started working on the hooks.

[cjohansen]

Excellent work 👏 Extra star for the documentation 😊

For "reasons" dumdom uses a manually updated pom.xml, which will need to list resources now. The only issue with this is that dumdom currently has development files in resources. I'll move those to dev-resources.

The hook itself looks good -- I have never made one, so I'm trusting your testing here. Good learning opportunity for me 😊

[PEZ]

I guess it makes sense to keep dev-resources separate.

I've added the auto-imported config to .gitignore now. Also made the project use the exported config, even though it doesn't seem that defcomponent is ever being used. But maybe someone writes an example or a test for it or something going forward...

[cjohansen]

Released as 2024.02.19, thanks 👍