Basic support for 1.19.1 / 1.19.2

[BruceChenQAQ]

Current Progress:

• [x] Login Support with online-mode=false
• [x] Login Support with online-mode=true, enforce-secure-profile=true
• [ ] Processing the text of received chats
• [ ] Present the received chat in the correct format
• [ ] Signature verification for chat messages
• [ ] Send MessageAcknowledgment packet when receiving chat
• [ ] Send chat and commands with signatures