[IntelliSense] Add tailwindFunctions á la Tailwind's Prettier plugin

[happycollision]

Short summary via some imaginary settings

It would be so nice if the VSCode extension had the same tailwindFunctions feature that the Prettier plugin has so that we could get color swatches and definitions on hover for whatever strings we define within known functions.
Here's a potential setting config and the resulting behavior:

// VSCode Settings JSON
{
...
"tailwindCSS.tailwindFunctions": ["tw"]
}

// someJsFile
import tw from "./my-tailwind-helper"

const baseClassName = tw("flex flex-col")
// Hovering over "flex" above shows the definition in your IDE

The long version

The combination of Tailwind, Tailwind's Prettier plugin, and Tailwind's VSCode extension are extraordinary. The Prettier plugin has this cool feature that allows you to define a tailwindFunctions array of strings which informs Prettier which functions in your code are expected to contain Tailwind classes so it knows which strings to rearrange. That is such a great feature.

I am sure you see where this is going: It would be so nice it the VSCode plugin had the same feature:

Hover a className attribute string (definition appears):

Hover a function with string args inside a className attribute (definition appears):

Hover a function registered with the Tailwind Prettier plugin (no class definition):

Being able to get color swatches and definitions for arbitrary strings would be great!

[wongjn]

For what it's worth, you could try configuring the tailwindCSS.experimental.classRegex setting to achieve something similar.