* Remove kinds verification for kind-registry
* Read plugin's json information with json library instead of use thema binding
* Remove grafanaplugin unification
* Don't use kindsys for extract the slot name
* Fix IsGroup
* Remove all plugindef generation
* Refactor schema interfaces
* Pushed this change from a different branch by mistake...
* Create small plugin definition structure adding additional information for plugins registration
* Add some validation checks
* Delete unused code
* Fix imports lint
