WIP/Feedback: New bandstructure visualiser?

[Bud-Macaulay]

WIP PR;
Wordy desc. below - not expecting you to read it, we can chat potentially.

Just rewrote the phonon and bands index files to incorporate the bands visualiser ive been working on. Mostly a new component that wraps the plotly plot into a div (with some formatting)

In principle it should be fairly easy to add this re-arrange bands button/download jsons but decided to keep the component clean for now. I dont know if CBM and VBM are passed through aiida/easy to calculate but the component should be able to accept singular traces (lines/markers) as input so if its easy to calculate we could maybe throw that in too? (this raises a question on legend etc, the legend is always going to be quite big or quite unreadable).

Could be an idea to show VBM and CBM where applicable as text+marker inside the textbox to the right.

There is a moderate disconnect now with the plotly plotter in the interactive section (albeit less than before), I think the one there looks great and we can maybe restyle the ones in the main body to match it, or make a small change on that components end?

[Bud-Macaulay]

Also quick comment: - I presume there is spin active systems on MC2D, i have not done any bandsplitting yet so they are rendered as the same traceFormat. I'm not sure if its a desired to do so, this could be done inside the react component but i think it might be a bit more consistent to split the bands before calling the component (we currently normalise to fermi, using some convoluted math Kristian wrote, before passing to the component too)