Add method to load a conversation

It is useful to have a method that allows to load a previous conversation:

Task<Guid> LoadConversationAsync(IEnumerable<ChatGptMessage> messages);

Task<Guid> LoadConversationAsync(Guid conversationId, IEnumerable<ChatGptMessage> messages, bool replaceHistory = true);

Consider the following guidelines:

• The first method must call the second one with Guid.NewGuid() as conversationId
• If replaceHistory = false, messages must be added to existing ones in the given conversation
• The total number of messages must not exceed the message limit defined in ChatGptOptions

[marcominerva]

You’re right, it is a typo. I have updated the description.

[InomjonIsmaylov]

Thanks a lot