Make raw-loader more specific and use .js extension for jscad

suggestion for #519

app/web/src/globals.d.ts

@@ -2,6 +2,6 @@
 // eliminates noisy TypeScript errors by registering these file endings as types.
 // Learned this method of registering modules from https://stackoverflow.com/a/57444766
 declare module "*.md";
-declare module "*.SCAD";
+declare module "*.scad";
 declare module "*.py";
-declare module "*.jscad";
+declare module "*.jscad.js";