Removal of the Dokkatoo plugin, integration with the `:clean` task ### Dokkatoo plugin The Dokkatoo plugin has been removed (#19, !37). Please migrate to the Dokka v2 plugin instead. ### Dokka plugin - The `:clean` task now deletes all files generated by the plugin (#20, !38) - The plugin automatically generates a `.gitignore` file in the `/api` folder (!38)