Initial Load testing for chat service

[parhamrahmani]

Initial Load testing for chat service

This PR will implement an initial implementation for load testing with k6 and how to implement it with a Quarkus test for handling cookies etc.

Enhances #1

Scenarios

• creating a chat session, sending 10 text messages and uploading a 1MB file to test the Apache Cassandra and Minio
  • Ramp up the number of virtual users (VUs)
  • Maintain peak load
  • Gradually reduce the load

Guide

A simple guide to integrate k6 scripts with a quarkus test to handle the session and cookies. See docs/guide.md

[parhamrahmani]

@astanik
This will be the very first simple implementation , just as the bare bone implementation. Further scenarios will be implemented. I also made a small guide on how to do the load testing with a Quarkus test.