SwiftUI Migration

[byuarus]

WIP

Ready

• connection
• telemetry
• video feed
• camera subscriptions
• camera settings
• actions
• video stream optimizations
• generate missions
• present missions on map
• add a yml file
• download photos
• show photo locations on the map during flight
• improve in-app debug message presentation

Not ready

• final cleanup and polishing
• check lists (queue of actions and subscriptions)
• fix all swift UI previews
• add gif with app demo

[julianoes]

@byuarus I suggest we merge this. I don't think anyone is going to review it, unfortunately.

[julianoes]

This is amazing and so much better than what we had before, so let's merge it!