Convert code to modern React and typescript

[vincentfretin]

Convert code to modern React, converting class components to function components, this will allow to use hooks (for i18n later) and UI render optimizations with createMemo that may have a perf impact when rendering some UI in XR with HTMLMesh.
Also convert styles from stylus to sass that is more popular, remove proptypes and use typescript.

[vincentfretin]

While we're at it, fix some issues in the types of @types/aframe https://github.com/DefinitelyTyped/DefinitelyTyped/blob/master/types/aframe/index.d.ts
Issue with addEventListener third param:

 sceneEl.addEventListener(
        "loaded",
        () => {
          setSceneLoaded(true);
        },
        // @ts-ignore
        {
          once: true,
        }
      );

It doesn't allow {once: true} in third param so with addEventListener(type, listener, options)
https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener#syntax
It seems it only has types for

addEventListener(type, listener)
addEventListener(type, listener, useCapture)

type for AFRAME.utils.device.isMobileVR() and AFRAME.utils.device.isMobileDeviceRequestingDesktopSite() are missing, maybe other exposed functions, to be verified.

[vincentfretin]

Another type issue with AFRAME.utils.coordinates.parse(value, defaultVec, target) current types only know about the first param.

[vincentfretin]

Also it doesn't recognize passing object:

plane.setAttribute("material", { color: "#FFF", shader: "flat", minFilter: "linear", src: "#video" });