feat(systemModules:host): add initial host configuration module

used to define general host configuration, including:

- hardware
- name
- admin
- type
- role

system/modules/host/hardware/gpu/intel/default.nix

@@ -0,0 +1,37 @@
+{ config, lib, pkgs, ... }:
+
+let
+  gpu = config.systemModules.host.hardware.gpu;
+  inherit (lib) mkIf;
+  inherit (builtins) elem;
+
+  # vaapiIntel = pkgs.vaapiIntel.override {enableHybridCodec = true;};
+in
+
+{
+  config = mkIf (elem gpu.type ["intel"]) {
+    
+    services.xserver.videoDrivers = ["modesetting"];
+    hardware.opengl = {
+      extraPackages = with pkgs; [
+        vaapiIntel
+        vaapiVdpau
+        libvdpau-va-gl
+
+        intel-compute-runtime
+        intel-media-driver
+      ];
+      extraPackages32 = with pkgs.pkgsi686Linux; [
+        vaapiIntel
+        vaapiVdpau
+        libvdpau-va-gl
+
+        intel-media-driver
+      ];
+    };
+    boot.initrd.kernelModules = ["i915"];    
+    environment.variables = mkIf config.hardware.opengl.enable {
+      VDPAU_DRIVER = "va_gl";
+    };
+  };
+}