Add Swift versions of the applewatch templates

https://github.com/appcelerator/titanium_studio/blob/master/plugins/com.appcelerator.titanium.ios.core/src/com/appcelerator/titanium/ios/core/IOSConstants.java#L85-L93 (
https://github.com/appcelerator/titanium_studio/search?q=APPLEWATCHKIT&type=Code
I think it would be best to leave out the --template option so that you let the CLI pick the default for the type, but the problem is that currently that default is still watchos1. With 5.2 it will become watchos2-swift, but we won't drop the Obj-C watchos2 until 6.0. So I think we should check the SDK version of the project and if it's >= 5.2 leave out the option.