Add an API for drawing a box

[varabyte]

Add an API for drawing a box

[bitspittle]

If we want overlaying text, e.g. a GAME OVER message drawing over the screen, this can be gnarly, because of needing to understand and update colors, e.g. above if the X's are yellow and Hello is red, we need to change the color back to yellow.

This probably means this feature is too custom and is kind of a deal breaker, unless we come up with some way to render text to an intermediate string and then we can merge those two together.

[bitspittle]

It's possible we could come up with an API similar to bordered which just got added today.

[bitspittle]

I don't think this has ever come up for me needing it, so I'm not going to add an API for it.

However, if you need it, you can delegate to justified:

justified(CENTER, minWidth = 10) {
   repeat(4) { textLine() }
   text("Hello")
   repeat(5) { textLine() }
}