Update linux dependency documentation for NixOS (and nix) (#16881)

# Objective
- Updates the linux-dependencies docs to 1) fix problems with nix
`alsa-lib`, and 2) include additional documentation to run bevy with nix
on non NixOS systems. (nix is a package manager that can be run outside
of NixOS).

## Solution
1. the nix `alsa-lib` package doesn't include `alsa-plugins`, which bevy
depends on. Instead, use the `alsa-lib-with-plugins` package, which
wraps `alsa-plugins` into `alsa-lib`. For more information see:
https://github.com/NixOS/nixpkgs/pull/277180
2. using nix on non NixOS systems, software like `nixGL` is required to
correctly link graphics drivers.

## Testing
- Tested on ubuntu 22.04 with nix.

docs/linux_dependencies.md

@@ -122,7 +122,7 @@ mkShell rec {
     pkg-config
   ];
   buildInputs = [
-    udev alsa-lib vulkan-loader
+    udev alsa-lib-with-plugins vulkan-loader
     xorg.libX11 xorg.libXcursor xorg.libXi xorg.libXrandr # To use the x11 feature
     libxkbcommon wayland # To use the wayland feature
   ];
@@ -134,6 +134,14 @@ And enter it by just running `nix-shell`.
 You should be able compile Bevy programs using `cargo run` within this nix-shell.
 You can do this in one line with `nix-shell --run "cargo run"`.
 
+If running nix on a non NixOS system (such as ubuntu, arch etc.), [NixGL](https://github.com/nix-community/nixGL) is additionally required,
+to link graphics drivers into the context of software installed by nix:
+
+1. Install an system specific nixGL wrapper ([docs](https://github.com/nix-community/nixGL)).
+   * If you're running a nvidia GPU choose `nixVulkanNvidia`.
+   * Otherwise, choose another wrapper appropriate for your system.
+2. Run `nixVulkanNvidia-xxx.xxx.xx cargo run` to compile a bevy program, where `xxx-xxx-xx` denotes the graphics driver version `nixVulkanNvidia` was compiled with.
+
 This is also possible with [Nix flakes](https://nixos.org/manual/nix/unstable/command-ref/new-cli/nix3-flake.html).
 Instead of creating `shell.nix`, you just need to add the derivation (`mkShell`)
 to your `devShells` in `flake.nix`. Run `nix develop` to enter the shell and