Move around files so the repo will be organized as a monorepo.

packages/geometry/src/anchor.mjs

@@ -0,0 +1,14 @@
+export class Anchor {
+	constructor(x, y) {
+		this.x = x;
+		this.y = y;
+	}
+	transform(tfm) {
+		return Anchor.transform(tfm, this);
+	}
+	static transform(tfm, a) {
+		const x = a.x * tfm.xx + a.y * tfm.yx + tfm.x;
+		const y = a.x * tfm.xy + a.y * tfm.yy + tfm.y;
+		return new Anchor(x, y);
+	}
+}