Persist session data

[stuckinforloop]

Description

As of now, the session data is not persistent and there isn't any way for the user to track progress. We can start by storing session data in a local file (csv seems like a good option)

This data can be used:

• to create a graph to visualize progress
• compare with other tits users to create a leaderboard system

For now, I'm thinking of storing data in a csv file ($HOME/.tits/results.csv) in below format:

id, wpm, accuracy, timestamp
00, 69, 80, 1714478274