Add support for @improbable-eng/grpc-web about connect-es

[timostamm]

@euskadi31, according to their README, @improbable-eng/grpc-web is a:

Library for making gRPC-Web requests from a browser

@bufbuild/connect-web implements the Connect protocol, but it also implements the gRPC-web protocol. To make a request with gRPC-web:

import { createGrpcWebTransport } from "@bufbuild/connect-web";

const transport = createGrpcWebTransport({
  baseUrl: "http://localhost",
});
const client = createPromiseClient(ElizaService, transport);
const res = await client.say({sentence: "Hello"});

You can find the documentation here.

If you are asking for callback-based clients, you can simply use createCallbackClient() instead of createPromiseClient(). You also have to option to create your own client. This is documented here.

Closing this, but please feel free to comment in case I missed something.