Testing hot-swapping renderers, which requires destroying and rebuilding the canvas after all. Fixed a few other related bugs and moved the imports into "bundle-contents.js".

js/bundle-contents.js

@@ -0,0 +1,8 @@
+import { Matrix } from "./Matrix";
+import inclusions from "./inclusions";
+import * as reglRenderer from "./regl/main";
+import * as webgpuRenderer from "./webgpu/main";
+globalThis.inclusions = inclusions;
+globalThis.reglRenderer = reglRenderer;
+globalThis.webgpuRenderer = webgpuRenderer;
+globalThis.Matrix = Matrix;