ComponentGraphics text

[Jhynjhiruu]

Per discussion in Discord, here's the HTML5 portion of my ComponentGraphics text PR.

Example usage:

componentGraphics.strokeStyle(Color.fromString("black"), 5);
componentGraphics.fillStyle(Color.fromString("white"));
for (node in _nodes) {
    componentGraphics.circle(node._xy.x, node._xy.y, 20);
}

componentGraphics.strokeStyle(null);
componentGraphics.fillStyle(Color.fromString("black"));
componentGraphics.fontStyle(10, "Sans Serif", "middle");
for (node in _nodes) {
    componentGraphics.text(node._xy.x, node._xy.y, 'node${node._id}');
}