Add state machine to ReconnectingWebSocket

[EhabY]

Summary

• Replace multiple boolean flags with a single ConnectionState enum for clearer state management
• Improves code readability and makes state transitions explicit

Changes

Refactored ReconnectingWebSocket to use a state machine pattern with six states:

• IDLE - Initial state, ready to connect
• CONNECTING - Actively running socket factory
• CONNECTED - Socket is open and working
• AWAITING_RETRY - Waiting for backoff timer before reconnection
• DISCONNECTED - Temporarily paused, user must call reconnect() to resume
• DISPOSED - Permanently closed, cannot be reused

This makes the websocket lifecycle easier to understand and debug, and prevents invalid state combinations that could
occur with independent boolean flags.