Adds a comprehensive suite of tests to validate both internal utilities and external interactions with the TikTok API.

• Enhances Reliability: Improves the overall stability and correctness of the client by verifying key components and live stream connectivity.
• Unit Testing: Introduces unit tests for fundamental functionalities, including JSON parsing, WebSocket URL construction, and Protocol Buffer encoding/decoding.
• Integration Testing: Implements real-time integration tests that connect to the TikTok HTTP API and WebSocket streams. These tests cover:
  • Verifying successful connections and reception of various live events (e.g., chat, gifts, likes).
  • Probing user status (online/offline) and handling user-not-found scenarios.
  • Fetching detailed room information.
• Flexible Execution: Designs integration tests to be conditionally enabled via environment variables, ensuring that standard CI builds remain unaffected while allowing developers to easily run full integration tests locally. The README.md provides detailed instructions and necessary variable configurations.
• Build Updates: Configures the pom.xml to integrate JUnit 5 for robust test execution.