Saving user progress on Notecards

[he00741098]

The saving of how well each term in a set is learned will likely be important. For it to sync however, the data will need to be stored on the server. There aren't a ton of options:

• Save in turso database
• Save in cloudflare database D1?
• Save in Astro DB
• Add a timelimit? Clearly the data doesn't need to be saved forever - people will likely forget
• Data analysis - Determining terms that are generally difficult to learn? This will likely be relatively costly. The alternative option is to simply store in user cache. This may be a worse experience however.

[he00741098]

Currently limiting progress to client side alone.