Support rest types in Syntax section of reference

[davepagurek]

Some of our signatures now support rest types, e.g. createVector. We currently do not display or type check this correctly. I've made a PR here to support type checking processing/p5.js#7803, and this adds the capability to display them in the reference.

It currently looks like this, using @GregStanton's idea borrowing from MDN the x1, x2, ..., xn syntax.

The Number: type is a little awkward here, but probably fine for now, and better than what we currently have.

For reference, how some other things display variadic arguments:

JavaScript

If we want the syntax section to reflect how one would write this in your own function, it would be:

createVector(...components)

...and also we'd document components as an array.

MDN

w3schools

Three.js

Lodash

Immutable.js

Oracle Java docs

[GregStanton]

This is fantastic @davepagurek! I love the list of documentation practices across the JS ecosystem and beyond :)