Add baked-in Node.js server template (successor to nodejs-template)

[Adi-204]

Context

We are archiving the standalone nodejs-template repo. Users still need a maintained way to generate Node.js servers from AsyncAPI documents inside the generator monorepo.

The legacy nodejs-ws-template can serve as a reference for WebSocket-specific patterns, but the goal here is a new baked-in template aligned with current generator architecture (packages/templates, React SDK, @asyncapi/keeper, shared components/helpers).

Goal

Add a baked-in Node.js server template to @asyncapi/generator that replaces the archived standalone template — multi-protocol where feasible, runtime message validation, and integration/acceptance tests following existing baked-in template conventions.

References

• https://github.com/asyncapi/nodejs-template (to archive)
• https://github.com/asyncapi/nodejs-ws-template
• Baked-in templates guide

[SHUBHANSHU602]

@Adi-204 I would like to work on this issue if u allow me ,