Is your feature request related to a problem? Please describe.
When installing mods made specifically for openmw, if its using openmw specific features (e.g omwgame, omwaddon, openmw animation support) MO2 throws up an error stating that the mod dosent have any valid files

Describe the solution you'd like
support .omwaddon and .omwgame files

Describe alternatives you've considered
potentially treat openMW as a separate game