Add support for mirror

[vincentfretin]

Using https://github.com/mrxz/fern-aframe-components/tree/main/mirror
The script is already in index.html

[vincentfretin]

I thought mirror was added in hubs addons, but it doesn't seem so.

[vincentfretin]

But we can easily add it to hubs addon by just writing a Python module if I remember.

[vincentfretin]

The mirror component will be added soon in the hubs addon as per the comment Hubs-Foundation/hubs-blender-exporter#63 (comment)

[vincentfretin]

mirror component in 1.5.0 https://github.com/MozillaReality/hubs-blender-exporter/releases/tag/1.5.0