🧹 Moved almost all files to /modules. Moved some code to separate files

modules/hardware/graphics/nvidia.nix

@@ -0,0 +1,15 @@
+{ ... }:
+
+{
+  hardware.nvidia = {
+    # Required
+    modesetting.enable = true;
+    # Use closed-source drivers
+    open = false;
+    # Enable the Nvidia settings menu
+    nvidiaSettings = true;
+  };
+
+  # Load Nvidia driver for Xorg and Wayland
+  services.xserver.videoDrivers = [ "nvidia" ];
+}