Graphs for session stats

[AnishDe12020]

To see the times over time

[carrotfarmer]

oh yes, i had actually implemented this before chucking it out

[carrotfarmer]

but the graph libs weren't that responsive and were very hard to use. do you know any good ones?

[AnishDe12020]

i havent used any but heard that recharts (https://recharts.org/) is good. this needs quite some work tho (also firebase doesn't store date/time yet so idk how to figure that part out)

ill try to make a pr (maybe gonna skip the date part and just do num of solves then) if i get time (will let u know)

in the meantime, if you can do it, that would be cool too

[carrotfarmer]

@AnishDe12020 I think im storing createdAt somewhere using snapshots, I'll just check and let you know