Refactor native directory handling in Rapier3D

[qurle]

I figured out that Rapier-related world join crashes on Apple Silicon Macs are caused by error in path resolving.

With this fix, Sable tries to place Rapier natives in ../.sable/ folder and fallbacks to user root directory: %userprofile%/.sable/ on Windows, ~/.sable/ on Mac and Linux.

Now Sable works on my Mac M2 Pro (and all depending mods are working too).
That fix will likely close #743, close #864, close #947 and surely close #934.

Needs to be tested on other ARM and x86 machines
JAR: sable-neoforge-1.21.1-1.2.2.jar.zip

[CLAassistant]

All committers have signed the CLA.

[qurle]

ARM Mac is fine. I’ll check x86 Windows by tomorrow.

ARM Windows, x86 Mac and Linux are waiting to be tested.

[IThundxr]

The better solution would be to use FMLPaths.GAMEDIR.get() on forge, and FabricLoader.getInstance().getGameDir() on fabric, the paths returned by those methods are absolute so using resolve on them will make sure that the paths are actually correct, and also will fix issues when users are using ATLauncher as ATLauncher stores all the instances in the .app

[D-a-t-D-u-d-e]

It works! Thanks qurle.