Refactor package management into modular Nix configuration

modules/core/packages/tools.nix

@@ -0,0 +1,46 @@
+{ pkgs, ... }:
+{
+  environment.systemPackages = with pkgs; [
+    # File management
+    trash-cli
+    file-roller
+    unrar
+    unzip
+    # System monitoring & info
+    inxi
+    lm_sensors
+    lshw
+    pciutils
+    usbutils
+    glxinfo
+    nix-output-monitor
+    nvd
+    onefetch
+    # Disk utilities
+    duf
+    dysk
+    ncdu
+    # Network & system utilities
+    ripgrep
+    wget
+    socat
+    ookla-speedtest
+    brightnessctl
+    killall
+    dex
+    # Desktop environment
+    networkmanagerapplet
+    tuigreet
+    nwg-displays
+    waypaper
+    uwsm
+    hyprpicker
+    cliphist
+    # Development utilities
+    pkg-config
+    appimage-run
+    libnotify
+    v4l-utils
+    kronometer
+  ];
+}