[FEAT | FIX]: added env config | removed dependency on sessionId during initialization of transporer

[igoyalsamarth]

Added an env config reading so the env variables are readable during development.

Also added a .env.example so it's easy to understand.

Fixed a case where we expected

(!sessionId && isInitializeRequest(req.body)

to be just

(isInitializeRequest(req.body))

considering that we have to create a new transporter instance, we don't care if the sessionId already exists or not.

The old code was also not compatible with

import { StreamableHTTPClientTransport } from "@modelcontextprotocol/sdk/client/streamableHttp";

and was giving me errors around the sessionId every time it had to initiazlied when coupled with

import { experimental_createMCPClient } from "ai";

(Vercel AI SDK)

My Apologies for too many lints and formats, just biome things.

[filesmuggler]

@mquan Can we approve it ASAP? MCP is really broken because of the session ID issues

[mquan]

Thanks for the contribution! Can you please isolate the change to only sessionId. If there're needs for linting and env config, please open a separate PR

[igoyalsamarth]

Thanks for the contribution! Can you please isolate the change to only sessionId. If there're needs for linting and env config, please open a separate PR

Sure thing, I can try to isolate.