Add Dell Precision 5680 profile

Adds hardware profile for Dell Precision 5680 with:
- Intel CPU with KVM support
- NVIDIA GPU with PRIME configuration
- Intel IPU6 webcam support
- Thunderbolt support
- Thermal management

dell/precision/5680/default.nix

@@ -0,0 +1,66 @@
+{
+  lib,
+  ...
+}:
+{
+  imports = [
+    ../../../common/pc/laptop
+    ../../../common/pc/ssd
+    ../../../common/cpu/intel
+    ../../../common/gpu/nvidia/prime.nix
+  ];
+
+  boot = {
+    kernelModules = [ "kvm-intel" ];
+    initrd.availableKernelModules = [
+      "xhci_pci"
+      "ahci"
+      "thunderbolt"
+      "nvme"
+      "usb_storage"
+      "sd_mod"
+      "rtsx_pci_sdmmc"
+    ];
+  };
+
+  hardware = {
+    # Audio
+    enableRedistributableFirmware = lib.mkDefault true;
+
+    # Webcam
+    ipu6 = {
+      enable = lib.mkDefault true;
+      platform = lib.mkDefault "ipu6ep";
+    };
+
+    bluetooth = {
+      enable = lib.mkDefault true;
+      powerOnBoot = lib.mkDefault true;
+    };
+
+    graphics.enable = lib.mkDefault true;
+    intel-gpu-tools.enable = lib.mkDefault true;
+
+    nvidia = {
+      modesetting.enable = lib.mkDefault true;
+      nvidiaSettings = lib.mkDefault true;
+      open = lib.mkDefault false;
+
+      powerManagement = {
+        enable = lib.mkDefault true;
+        finegrained = lib.mkDefault true;
+      };
+
+      prime = {
+        intelBusId = lib.mkDefault "PCI:00:02:0";
+        nvidiaBusId = lib.mkDefault "PCI:01:00:0";
+      };
+    };
+  };
+
+  services = {
+    fwupd.enable = lib.mkDefault true; # update firmware
+    hardware.bolt.enable = lib.mkDefault true; # use thunderbolt
+    thermald.enable = lib.mkDefault true; # cpu temp management
+  };
+}