Reduce the repository size

[coderedart]

.git/ directory is 193 MB A clean copy of the repository checked out after clone is currently at 440 MB. examples/assets/ contributes 246 MB

Here is the output of du -sh * | sort -h inside the assets directory:

1.7M    maps
3.1M    COLOMBE.obj
4.2M    Skull.vol
7.4M    gltf
16M     pfboy.png
23M     syferfontein_18d_clear_4k.hdr
27M     chinese_garden_4k.hdr
44M     Gledista_Triacanthos.obj
51M     sponza
68M     pfboy.obj

The size of the rust code including src and examples is just 1 MB...

I think it would make sense to either host these examples in a separate repository or store these asset files somewhere online and download them manually and place them in assets directory if someone wants to run the examples.