The source project of this merge request has been removed.
Register the KateHextHintManager as a regular QObject property
This allows using it in other hosting apps (and fixes crashes when plugins try to access it).
Also change the plugin to be allocated lazily.
Note: Fixes an obvious crash in RKWard when using the LSP client plugin, but also, quite trivially, allows to use the KateTextHintManager inside RKWard.