FR: Add watchOS support

It'll be really cool If I could add a watchOS target to the already existing ios app. If I add a target through Xcode, it is unable to access the "shared" files and I get this error "Building for watchOS Simulator, but the linked framework 'shared.framework' was built for iOS Simulator. kotlin project"
I couldn't find a lot of resources on this so I think this could be a nice addition to this project.

Review the existing iOS target and shared framework setup first, then investigate the reported watchOS Simulator architecture mismatch. Done means the sample has a working watchOS target that can access the shared code and builds successfully for the watchOS Simulator.

Written by the indexing model from the issue text.