Apex charts

[aptkingston]

Apex charts have arrived!

This PR adds a selection of configurable chart components, courtesy of Apex Charts. There are bar, line, pie, donut and candlestick charts, as well as subsets of all of these (stacked / multiple data series). Charts require a data source which can be a table, view or even a relationship.

This is still a WIP and I'd appreciate any testing. The more types of data we test, the more bugs we'll be able to fix. There's also a few things we need to decide, such as how large we want to cap data sets when displaying them (apex charts does not have great performance so we're going to have to limit data sets in the worst case to a few hundred values).

Features
All charts have quite a few configurable settings, all set to sensible defaults. There are some options which are unique to each type of chart.

• Animations for all charts
• X and Y axis labels
• Graph titles
• Formatting of Y axis (thousands, millions)
• Support for time series data
• Configurable curves
• On-chart data labels
• Legends
• Super robust (hopefully no more crashes when using charts no matter how hard you try to break it)
• Multiple data series for most charts
  

Relationships
Charts can use a relationship column as a data source. Here's an example displaying a single users expenditure, based on the sale records linked to a particular user on their details page.

[joebudi]

So much beauty in one PR! From a UI perspective, it looks beautiful.

[shogunpurple]

Looking good so far! Great work 👌

[aptkingston]

Could do with some opinions on colours. Because all charts support multiple colours we can't really let users pick each individual colour, so I think we have 3 options:

• Use default apex chart colours
• We pick a sensible set of colours different from apex charts default and they can't be changed
• We pick a few different colour palettes and users can pick between them (I'm thinking we use something like the gradient names and associated colours from certain gradients). It might be hard to do this because there needs to be a balance of enough contrast within each palette, but enough differences between each palette

Any thoughts?

[joebudi]

@aptkingston How many palettes does Apex provide? It would be good to see them. Charts are usually more tint-focused than gradient if that makes sense. Happy to Budi up with this.

[aptkingston]

Didn't realise apex actually has palettes built in so that makes life much easier! I've added the 10 palette options they provide and here they are:

[mike12345567]

This looks incredible, love it so much! 🔥