[FEAT] Add Support for Swift (iOS)

Summary

Add a Swift SDK for Tambo to enable native iOS developers to build AI-powered apps.

[!IMPORTANT] This issue is to gauge interest only. We are not looking for contributors on this issue. If you have proven experience in developing new SDKs and integrations for Swift, we encourage you to make an example/community sdk in your own repository. If you have suggestions or questions, please reach out on our discord.

Motivation

Swift is the primary language for native iOS development. A Swift SDK would enable iOS developers to use Tambo without React Native.

Scope

• Swift package for Tambo integration
• SwiftUI components
• Documentation and examples