Add word stats breakdown

[jzohrab]

Add a table of the word counts/term counts by status.

[shetozz]

Instead of a table, can we add a pie chart like Anki's

It should show the different stats of terms, and total number of terms, both in numbers and percentages Not sure if you also can track this on a timeline so you can add lines for different term states like the current one for the number of read words.

If possible, it should look something like this

[jzohrab]

Lute currently doesn't track the status hist over time, it just has the current status -- so you won't see this kind of history. It could be added, that'd be straightforward, and maybe some people would find it motivating.