Echarts implementation

[AmbossKeegan]

• Moved all BarCharts to echarts and removed old BarCharts
• Moved all HorizontalBarCharts to echarts and removed old HorizontalBarCharts
• Created the Sankey chart as a replacement for the chord graph
• Removed Visx and the Chord graph

[secondl1ght]

Ok nice work, after my review I have a few suggestions/questions:

• we should probably change the minimum Y Axis interval to 1 because you can't have a fraction of a payment or invoice
• the time scale displayed on the X Axis is different from the original chart, not sure if this matters?
• it looks to me like the Payments chart is not working (I made a payment but nothing was displayed when I toggled the chart however it's working on master)
• there is an error in the console about server rendering (this is also on master but might be an opportunity to fix it now)
• the tooltip styling is different from the original chart (the original is much more minimal which I like better but it is personal preference)
• rather than trying to create a component for this Bar Chart we could just place the code inline in the desired file (like we talked about on the call today this approach is more flexible)
• the legend and main titles don't match the dropdown values for example Amount/Tokens vs. Count/Amount
• the previous chart did not have a Title or Legend, do we want to keep the new chart also minimal in appearance?

Please let me know if any of my comments are not clear, I can provide screenshots or more details if needed.

[secondl1ght]

My comments are mostly nits at this point so I think it's ready for @apotdevin to take a final review now and see if he is happy with it.

• do we need a y label if its the same as the title?
• make title copy match dropdown copy for consistency
• is there a date format standard on TH like there is for Amboss? (for example to use in the tooltip dates)
• we could format the volume numbers in the tooltip to make them more readable by adding commas (we could port the function over from Amboss)
• I like the colors/style of the original tooltip but again this is just a personal preference or nit

[apotdevin]

• Let's reduce the padding the chart has - seems to big right now
• I agree with Matt that we probably don't need the y-axis if the title is the same
• Agree that mumbers with commas are easier to read!

[secondl1ght]

Nice, left some comments/suggestions inline!

[apotdevin]

• Padding around this chart is weird, lets try to center all charts inside the card.

• Same here. Can we center and add the x-axis. There also seems to be an extra empty category?

• For the y-axis can we format numbers similar to amboss space? 1800000 -> 1.8m

• This chart get's cut off

[apotdevin]

What is needed to finish this PR @AmbossKeegan ?

[AmbossKeegan]

What is needed to finish this PR @AmbossKeegan ?

Just pushed a commit with code that bounds the sankey data inside its chart. Also provided a mock-data function that can be used to generate an arbitrarily large sankey dataset for testing purposes.

As far as I am aware, this was the last outstanding piece of feedback that needed to be addressed for this PR.