Function generateAsyncApiSpec

generateAsyncApiSpec(options: AsyncApiOptions): AsyncApiDocument
Generates an AsyncAPI 3.0 document from a set of WebSocket subscription registrations.

Each subscription becomes:
- A channel with its address and optional messages (for outgoing server→client events and/or incoming client→server messages).
- One or two operations: a send operation for server→client events and/or a receive operation for client→server messages.
Named schemas (those with .schemaName() set) are automatically collected and emitted as components.schemas entries with $ref pointers.
Parameters
- options: AsyncApiOptions
  Configuration including subscription registrations and API info.
Returns AsyncApiDocument
A plain AsyncAPI 3.0 document object suitable for JSON.stringify.
Example
```
import { generateAsyncApiSpec } from '@cleverbrush/server-openapi';
import { server } from './server.js';

const spec = generateAsyncApiSpec({
    server,
    info: { title: 'My API', version: '1.0.0' },
    servers: {
        production: { host: 'api.example.com', protocol: 'wss' },
    },
});
```
- Defined in generateAsyncApiSpec.ts:211