feat: introduce namespace config and new websocket transmission

[lukeocodes]

Large refactor of internal code. New changes:

• Namespace Configuration: Implementation of namespace options to manage configurations more effectively.
• WebSocket Transmission: Introduction of new WebSocket logic to allow users to provide custom websocket transmitters, as well as reconnect the connection and provide API key factories to the websocket config (for client-side reconnections using short lived tokens).
• REST client transmission: Introduction of new logic around fetch to allow users to provide a custom fetch interface, as well as expose more native fetch options to the client configuration.
• Client Abstractions: Rebuilt clients to support namespace options.
• Config and Class Interfaces: Rebuilt configuration and class interfaces for better modularity.
• Legacy Options Conversion: Conversion of all legacy options to the new namespaced options.
• Live Client Integration: Integration of live client with the new options.
• REST Client Integration: Integration of REST clients with the new options.
• Documentation Updates: Updated README and examples to reflect the new changes.

[lukeocodes]

@jpvajda this is ready for review now. But it's so big, I recommend we all clone it and run the examples