feat: add WebSocket load testing script for Liku-AI

- Implemented a load testing script to evaluate server capacity with multiple concurrent WebSocket connections.
- Configurable options for connections, ramp-up rate, duration, message frequency, and profiling.
- Includes detailed statistics tracking for connections, messages, latencies, and memory usage.
- Provides a final report summarizing test results and performance assessment.

Author: TayDa64