Update 0.6.1 - WIP WebGL build 2

Still optimizing and completing the WebGL browser build.

I have added a fallback version for the blood VFX effect. The original blood VFX was made using Unity VFX graph which is incompatible with WebGL because of the necessary compute shaders. That's why I had to remake the blood within Unity's default particle system, also called "Shuriken". Shuriken is much more limited and required me to simplify the effect. Also it's maybe more performant now (or maybe not).

Now I would have to adjust animations that made use of the original VFX, which is lots of work. Will probably do that next before I continue with the goals I mentioned in the last update.