Perform get chat from room

[bakunya]

This pull request introduces a new feature to retrieve chat messages from chat characters or room. The feature can be used in two ways:

1. From Chat Character:

   • You can now fetch chat messages associated with a specific character by using the following code:

     await client.chat.get_chat(char="ID")

     Where "ID" represents the character's ID, which can be obtained from the URL parameter /chat?char=ID.

2. From Room Chat:

   • Additionally, you can retrieve chat messages related to a specific chat history by using this code:

     await client.chat.get_chat(history_id="ID")

     Here, "ID" corresponds to the history ID, which can be extracted from the URL parameter /chat?hist=ID.

Please review and merge this pull request to incorporate these changes into the codebase.