qmlls: Goto Type Definition returns path instead of URI

When using Kate with qmlls, Goto TypeDefiniton seems to be broken because we apparently return a path instead of a URI.

Way to reproduce: Open the filesystemexplorer example, click on MyMenuBar and select "Goto Type Definition".

Using QUrl::fromLocalFile in QmlGoToTypeDefinitionSupport::process before assigning to l.uri seems to help, but it's unclear if we shouldn't normalize to an URI