Start adding ide colors, includes adding custom theme to openscad

Resolves #365

app/web/src/components/PanelToolbar/PanelToolbar.tsx

@@ -7,14 +7,14 @@ const PanelToolbar = ({ panelName }: { panelName: string }) => {
   return (
     <div className="absolute top-0 right-0 flex items-center h-9">
       <button
-        className="bg-gray-500 text-gray-300 px-3 rounded-bl-lg h-full cursor-not-allowed"
+        className="bg-ch-gray-760 text-ch-gray-300 px-3 rounded-bl-lg h-full cursor-not-allowed"
         aria-label={`${panelName} settings`}
         disabled
       >
         <Svg name="gear" className="w-7 p-px" />
       </button>
       {mosaicWindowActions.connectDragSource(
-        <div className=" text-gray-500 bg-gray-300 cursor-grab px-2 h-full flex items-center">
+        <div className=" text-ch-gray-760 bg-ch-gray-300 cursor-grab px-2 h-full flex items-center">
           <Svg name="drag-grid" className="w-4 p-px" />
         </div>
       )}