[Change] Replace the Nix shell with a Nix flake

Author: TacoConKvass

flake.lock

@@ -0,0 +1,18 @@
+{
+    description = "TML modding setup";
+
+    inputs = {
+        nixpkgs.url = "github:nixos/nixpkgs/nixos-24.11";
+    };
+
+    outputs = { self, nixpkgs }: let 
+        system = "x86_64-linux";
+        pkgs = import nixpkgs { inherit system; };
+    in {
+        devShells.${system}.default = pkgs.mkShell {
+            packages = [
+                pkgs.dotnet-sdk
+            ];
+        };
+    };
+}