Enhance the chat request configuration

[penguineer]

This pull request introduces several changes to improve error handling and enhance the flexibility of chat request configurations. The most important changes include the introduction of a new ChatException class, modifications to the ChatRequest class to support additional parameters, and updates to the AIChatService to use these new features.

Error Handling Improvements:

• Introduced a new ChatException class to handle different error scenarios with specific error codes. (src/main/java/com/penguineering/hareairis/model/ChatException.java)
• Updated the ChatError class to utilize the new ChatException for error handling. (src/main/java/com/penguineering/hareairis/model/ChatError.java)
• Modified ChatRequestHandler to replace ChatError with ChatException for consistent error handling and logging. (src/main/java/com/penguineering/hareairis/rmq/ChatRequestHandler.java) [1] [2] [3]

Chat Request Enhancements:

• Enhanced the ChatRequest class to include additional parameters such as maxTokens, temperature, topP, presencePenalty, and frequencyPenalty to provide more control over the chat generation. (src/main/java/com/penguineering/hareairis/model/ChatRequest.java)

Service Updates:

• Updated AIChatService to utilize the new parameters from ChatRequest and handle exceptions using ChatException. (src/main/java/com/penguineering/hareairis/ai/AIChatService.java) [1] [2] [3]