Add testing configs

config/nix/flake.nix

@@ -0,0 +1,66 @@
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.05";
+    nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+    nix-jetbrains-plugins.url = "github:theCapypara/nix-jetbrains-plugins";
+  };
+
+  outputs = { self, nixpkgs, nixpkgs-unstable, flake-utils, nix-jetbrains-plugins }:
+  flake-utils.lib.eachDefaultSystem (system: let
+    pkgs = import nixpkgs {
+      inherit system;
+      config.allowUnfree = true;
+    };
+    pkgs-unstable = import nixpkgs-unstable {
+      inherit system;
+      config.allowUnfree = true;
+    };
+
+    python-packages = p: with p; [
+      numpy
+    ];
+
+    pluginList = [
+      "be.ugent.piedcler.dodona"
+      "com.github.copilot"
+      "com.google.tools.ij.aiplugin"
+      "IdeaVIM"
+    ];
+
+    mkShell = pkgs.mkShell.override {
+      stdenv = pkgs.stdenvAdapters.useMoldLinker pkgs.stdenv;
+    };
+  in {
+    devShells.default = pkgs.mkShell {
+      packages = (with pkgs; [
+        python311
+        (python-packages python311Packages)
+
+        # CUDA
+        git gitRepo gnupg autoconf curl
+        procps gnumake util-linux m4 gperf unzip
+        cudatoolkit linuxPackages.nvidia_x11
+        libGLU libGL
+        xorg.libXi xorg.libXmu freeglut
+        xorg.libXext xorg.libX11 xorg.libXv xorg.libXrandr zlib
+        ncurses5 stdenv.cc binutils
+      ]) ++ (with pkgs-unstable; [
+        uv
+      ]) ++ (with nix-jetbrains-plugins.lib."${system}"; [
+        # Editor of your choice
+        #(buildIdeWithPlugins pkgs-unstable.jetbrains "pycharm-professional" pluginList)
+      ]);
+
+      # CUDA
+      CUDA_PATH = pkgs.cudatoolkit;
+      # ImportError: libstdc++.so.6: cannot open shared object file: No such file or directory
+      LD_LIBRARY_PATH = "${pkgs.linuxPackages.nvidia_x11}/lib:${pkgs.ncurses5}/lib:${pkgs.libGL}/lib/:${pkgs.stdenv.cc.cc.lib}/lib/:${pkgs.glibc}/lib";
+      EXTRA_LDFLAGS = "-L/lib -L${pkgs.linuxPackages.nvidia_x11}/lib";
+      EXTRA_CCFLAGS = "-I/usr/include";
+
+      # Stop uv from downloading Python binaries automatically if needed.
+      UV_PYTHON_DOWNLOADS = "never";
+    };
+  });
+}