To simplify the API before exporting the `PerMessageDeflate` class,
reduce the number of positional parameters in the constructor by moving
`isServer` and `maxPayload` into the options object.

Export the `PerMessageDeflate` class, the parser and serializer for the
`Sec-WebSocket-Extensions` header, and the parser for the
`Sec-WebSocket-Protocol` header.

Documentation is intentionally omitted as these utilities are primarily
intended for niche use cases rather than general consumption.

Refs: #2313