refactor: flake dir -> outputs/sys -> nixos

nixos/modules/base/host/hardware/features/bluetooth.nix

@@ -0,0 +1,24 @@
+{ config, lib, pkgs, self, ... }:
+
+let
+  features = config.ooknet.host.hardware.features;
+  inherit (lib) mkIf;
+  inherit (builtins) elem;
+in
+
+{
+  config = mkIf (elem "bluetooth" features) {
+    hardware.bluetooth = {
+      enable = true;
+      package = pkgs.bluez5-experimental;
+    };
+  
+    environment.systemPackages = with pkgs; [
+      self.packages.${pkgs.system}.live-buds-cli
+  	  bluetuith
+  	];
+
+    # https://github.com/NixOS/nixpkgs/issues/114222
+    systemd.user.services.telephony_client.enable = false;
+  };
+}