Loading and void script.evaluate() (#796)

* Loading and Script evaluate with Promise.all

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Move to 'void script.evaluate();'

* chmod files to 644

* Add a test

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

examples/webgl/raycaster/index.html

@@ -24,9 +24,6 @@
 
 <script defer src="https://pyscript.net/latest/pyscript.js"></script>
 <link rel="stylesheet" href="https://pyscript.net/latest/pyscript.css" />
-<script>
-
-</script>
 <py-script>
 from pyodide.ffi import create_proxy, to_js
 from js import window
@@ -34,6 +31,7 @@ from js import Math
 from js import THREE
 from js import performance
 from js import Object
+import asyncio