feat: Produce an archematics plugin that works in Firefox (#38)

With this loaded in under the Firefox debugger, one can see linked WRL files and Java Geometry Applets on arbitrary web pages.
This represents significant progress on #28, but getting more controls and getting it to work in other browsers is still on deck.

Reviewed-on: #38
Co-authored-by: Glen Whitney <glen@studioinfinity.org>
Co-committed-by: Glen Whitney <glen@studioinfinity.org>

public/index.html

@@ -10,6 +10,7 @@
       <li> <a href="inscribed-equilateral.html">Before</a> </li>
       <li> <a href="inscribed-revived.html">Revived</a> </li>
       <li> <a href="inscribed-modified.html">After</a> </li>
+      <li> <a href="jelts/book1/joyceDefI2.html">Book I Def 2</a> </li>
     </ul>
     <h2>WRL Files</h2>
     <ul><li> <a href="wrl_2.html">Target two</a></li>