Create block for changing position of hemispheric light

[Zishan-Rahman]

I opened this as a draft PR as it still isn't quite complete. At present the block exists but, firstly, it's formatted strangely, unlike the other blocks for some reason (and I haven't done anything unique to make it this way; I was expecting it to all be in one line):

And secondly, the block itself causes issues when added to the start block. For starters, when I try and append it to the basic sky-and-map snippet, the map itself seems to refresh, and then barely anything happens after that as I can't really do anything else with the UI like change the camera direction by dragging as I usually would. The light position certainly doesn't seem to change either. Even re-running the project through the run/play button doesn't change much in this regard.

Furthermore, when I try to open FlockXR from the beginning with a leftover project containing that hemispheric light position block, nothing renders at all until I remove said block and rerun the project:

So it's hopefully clear that there's at least something wrong with my current code.

I welcome advice and suggestions.

[tracygardner]

@Zishan-Rahman You've missed the inline setting for inputs.

But I thought we agreed that we would create a way to access the light as a variable like we do for the camera so that we wouldn't need separate blocks.