Implement the aiosqlite library so that our bot can store data in an asynchronous way

[keenanbuckley]

• Issues like Role Assignment #3 might require some level of data storage for the program to keep track of data for longer periods of time.
• models.py is for data structures outlining data stored outside program memory (such as .env). Anything we put into a database should probably be defined there.
• I am initially recommending aiosqlite, an asynchronous implementation of SQLite, though MongoDB might work as well.
• Further discussion is likely required

[keenanbuckley]

I've decided to go with aiosqlite. I'll open a branch for it and start getting it working.