Add flag to generate cross platform Typescript

[BlueSialia]

Currently the Client Library Generator creates a client for browser by default, but with the --node flag we can create a client for NodeJS.

I've noticed the only difference between them is that the client for node imports node-fetch and ws.

Would it be possible to have a flag, say --isomorphic, that will produce a client that imports isomorphic-fetch (or cross-fetch) and isomorphic-ws?

I want to use the Zeus client in both platforms and I currently add those imports manually everytime I generate the client.

[aexol]

of course