Lean Clients

[maurerbot]

Generator should support leaner clients by specifying transport class upfront

Describe the solution you'd like
Within components subset of client.ts to eliminate switch statements and import only the transport requested.

Describe alternatives you've considered
None

Additional context
Here is the switch statement and import to be removed

import { RequestManager, PostMessageWindowTransport, PostMessageIframeTransport, WebSocketTransport, HTTPTransport, HTTPTransportOptions, Transport, Client, JSONRPCError } from "@open-rpc/client-js";


switch (type) {
      case 'injected':
        this.transport = injected;
        break;
      case 'http':
      case 'https':
        this.transport = new HTTPTransport((protocol || type) + "://" + host + ":" + port + path );
        break;
      case 'websocket':
        this.transport = new WebSocketTransport((protocol || "ws://") + host + ":" + port + path);
        break;
      case 'postmessageiframe':
        this.transport = new PostMessageIframeTransport(protocol + "://" + host + ":" + port + path);
        break;
      case 'postmessagewindow':
        this.transport = new PostMessageWindowTransport(protocol + "://" + host + ":" + port + path);
        break;
      default:
        throw new Error("unsupported transport");
        break;
    }
    ```