feat: add clj-kondo plugin

[rynkowsg]

Summary

Description:

• Tool repo URL: https://github.com/clj-kondo/clj-kondo
• Plugin repo URL: https://github.com/rynkowsg/asdf-clj-kondo

Checklist

• Format with scripts/format.bash
• Test locally with scripts/test_plugin.bash --file plugins/<your_new_plugin_name>
• Your plugin CI tests are green
  • Tip: use the plugin_test action from asdf-actions in your plugin CI

[rynkowsg]

Info about this plugin has just been added to clj-kondo installation notes:
https://github.com/clj-kondo/clj-kondo/blob/master/doc/install.md

[jthegedus]

Thanks