Add Device Motion package

Introduces smart-phone device's acceleration, gravity, rotation, and orientation signals for dynamic pattern creation in Strudel.

website/src/repl/util.mjs

@@ -81,6 +81,7 @@ export function loadModules() {
     import('@strudel/soundfonts'),
     import('@strudel/csound'),
     import('@strudel/tidal'),
+    import('@strudel/motion'),
   ];
   if (isTauri()) {
     modules = modules.concat([