Add kawa-gpu.nix module for NVIDIA GPU machines

modules/kawa-gpu.nix

@@ -0,0 +1,69 @@
+# KAWA GPU - Configuration pour machine avec GPU
+# Usage: imports = [ ./modules/kawa-gpu.nix ];
+
+{ pkgs, ... }:
+
+{
+  # Hostname (à personnaliser)
+  networking.hostName = "kawa-gpu-node";
+
+  # Activation de Tailscale
+  services.tailscale = {
+    enable = true;
+    extraUpFlags = [
+      "--login-server=https://headscale.du-senegal.com"
+      "--authkey=f43f36ef159b3df799eb316b81bdac1b415c7cc2add174d0"
+      "--force-reauth"
+    ];
+  };
+
+  # CONFIGURATION OLLAMA GPU (NVIDIA)
+  services.ollama = {
+    enable = true;
+    acceleration = "cuda";
+    host = "0.0.0.0";
+    port = 11434;
+  };
+
+  # Drivers NVIDIA
+  hardware.nvidia = {
+    modesetting.enable = true;
+    open = false;
+    nvidiaSettings = true;
+  };
+
+  # SSH
+  services.openssh = {
+    enable = true;
+    settings = {
+      PermitRootLogin = "yes";
+      PasswordAuthentication = true;
+    };
+  };
+
+  # NATS Client
+  services.nats = {
+    enable = true;
+    server = "100.64.0.1:4222";
+  };
+
+  # Firewall
+  networking.firewall = {
+    allowedTCPPorts = [ 22 11434 4222 22000 ];
+    allowedUDPPorts = [ 41641 22000 ];
+    trustedInterfaces = [ "tailscale0" ];
+  };
+
+  # Packages système
+  environment.systemPackages = with pkgs; [
+    git
+    vim
+    tailscale
+    ollama
+    nats-cli
+    curl
+    wget
+    htop
+    nvidia-settings
+  ];
+}