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

modules/networking.nix

@@ -0,0 +1,20 @@
+{ ... }:
+
+{
+  networking = {
+    networkmanager.enable = true;
+    hostName = "nixos";
+    # wireless.enable = true;  # Enables wireless support via wpa_supplicant.
+  };
+
+  # Configure network proxy if necessary
+  # networking.proxy.default = "http://user:password@proxy:port/";
+  # networking.proxy.noProxy = "127.0.0.1,localhost,internal.domain";
+  # Open ports in the firewall.
+  # networking.firewall.allowedTCPPorts = [ ... ];
+  # networking.firewall.allowedUDPPorts = [ ... ];
+  # Or disable the firewall altogether.
+  # networking.firewall.enable = false;
+
+  services.tailscale.enable = true;
+}