feat(frequency): play with a manual frequency graph

[jrmlhermitte]

Description

Playing with a manual frequency graph.

This is mainly here to better understand javascript and typescript. I plan on switching this to use something like chartjs or maybe plotly. There are tons of plotting candidates though and we might consider choosing another one.

Screenshots

[ajmas]

This is fine. I wouldn’t use a plotting library, since it likely be overkill and increase bundle size.

[jrmlhermitte]

Thanks! The code quality isn’t very good right now. I’ll refactor into separate files and add tests later in a separate PR. I’ll make an issue about it later when I’m able to get to a computer so we can keep track of our plans.

still very rough prototype.