One-to-One Messaging - Message Module

[MrAlphalfa97]

• a 'message-sending' function that will write new Message documents to 'chat room'
• a 'message-receiving' function will read Message documents from the 'chat room' in real-time

[samanthawiley]

Wrote database functions for Firebase:

1. Create new Chat room
2. Add User to Chatroom
3. Load Chat History in Real-time Helped refactor load and display chatroom functions