Better alternative to FlxG.bitmap.whitePixel

Continued from: https://github.com/HaxeFlixel/flixel/issues/3619#issuecomment-4780504475

The expected usage of whitePixel for solid rectangular sprites is:

sprite.frame = FlxG.bitmap.whitePixel;
sprite.setGraphicSize(someWidth, someHeight);
sprite.color = someColor;

Setting the scale of the sprite won't work because whitePixel is actually 10x10, which is very misleading. I would like a new option that is actually 1 pixel perhaps just pixel

Would be nice if there was a single method to do this, similar to the ease of

sprite.makeGraphic(someWidth, someHeight, someColor);

I think in order to better convey what is actually going on in relation to makeGraphic, which has different use cases, we should make something like:

FlxG.bitmap.pixel.loadInto(sprite, someWidth, someHeight, someColor);

Start by comparing the existing FlxG.bitmap.whitePixel and sprite.makeGraphic usage described in the issue. Determine the API shape that best supports a true one-pixel solid sprite and the proposed width, height, and color workflow. Done means a decided, documented approach with agreement on how it relates to the existing makeGraphic use cases.