Support configurable retry policy for WebSocket reconnections

[meteor199]

Currently stompjs does not provide configurable options for retrying WebSocket reconnections after disconnects.

It would be very helpful if stompjs could support custom retry policies through configuration options, similar to the reconnection options provided in socket.io:

https://socket.io/docs/v4/client-options/#randomizationfactor

The key options are:

• reconnectionAttempts
• reconnectionDelay
• reconnectionDelayMax
• randomizationFactor

With configurable retry, users can implement backoff retry, customize max intervals and attempts according to their needs.

[kum-deepak]

Will target for the v7.1