Added nixos dev environment

.envrc

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+use flake

.gitignore

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+.direnv/

flake.lock

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+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1770841267,
+        "narHash": "sha256-9xejG0KoqsoKEGp2kVbXRlEYtFFcDTHjidiuX8hGO44=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "ec7c70d12ce2fc37cb92aff673dcdca89d187bae",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

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+
+{
+  description = "Odin shell";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+  };
+
+  outputs = { self, nixpkgs }:
+    let
+      supportedSystems = [ "x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
+      forAllSystems = f: nixpkgs.lib.genAttrs supportedSystems (system: f {
+        pkgs = import nixpkgs { inherit system; };
+      });
+    in
+    {
+      devShells = forAllSystems ({ pkgs }: {
+        default = pkgs.mkShell {
+          nativeBuildInputs = with pkgs; [
+            odin
+            ols
+          ];
+
+          buildInputs = with pkgs; [
+            libGL
+            # X11 dependencies for Raylib
+            raylib
+            xorg.libX11
+            xorg.libXcursor
+            xorg.libXi
+            xorg.libXinerama
+            xorg.libXrandr
+          ];
+
+          shellHook = ''
+            echo "// ODIN DEV SHELL //"
+            export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:${with pkgs; lib.makeLibraryPath [
+              libGL
+              raylib
+              xorg.libX11
+              xorg.libXcursor
+              xorg.libXi
+              xorg.libXinerama
+              xorg.libXrandr
+            ]}"
+          '';
+        };
+      });
+    };
+}