I’m not sure if there will be any support from the studio plugin, probably other can tell you more about such plans.
Practically speaking you can just create a new blank project with flow UI with the same root package name, project ID etc. and then open up both projects in IDEA.
Then you can simply do a single copy and paste of the whole project tree without the UI controllers and then generate the UIs one by one and do the migration.
Alternatively you can copy your whole project, and manually add the dependencies to the flow UI. Then Studio will also recognize the new UI module and you can go ahead and generate the new screens - or simply change the dependencies in place directly.
Cheers
Mario