A Gleam WebSocket consumer for AT Protocol Jetstream events.

feat: add automatic retry logic to start_consumer (v1.1.0) master

- merge retry configuration into JetstreamConfig - add max_backoff_seconds, log_connection_events, log_retry_attempts fields - start_consumer now always retries with exponential backoff - distinguish between harmless timeouts and real connection failures - update documentation with integrated retry options - update example and tests