This results in windows users not needing to rename the DLL. This allows native llama builds to be dropped in, even on windows.

I also took the time to update the documentation, removing references to renaming the files, since the names now match.

Fixes #463

- Built by this run: https://github.com/SciSharp/LLamaSharp/actions/runs/6921572568
 - commit: `e937066420b79a757bf80e9836eb12b88420a218`
 - Rearranged paths

This reverts commit b4b3ea9d99.

Just merge cuda and avx detection and change layout.

Create different paths to different MacOS platforms.
Dynamically load the right library

Metal depends on this file to execute, and MacOS llama.cpp defaults is now METAL.

See on Mac OS enable Metal by default #2901

Add metal libraries and ggml-metal.metal helper