Implement rich NixOS configuration system

✅ COMPLETE: Full NixOS-style configuration system implemented

🎯 Features:
- Rich configuration options for Quickshell, Hyprland, and Terminal
- Type-safe NixOS module options with defaults and descriptions
- Generated configuration files from Nix expressions
- Example configurations (gaming, productivity, minimalist)
- Comprehensive documentation

🔧 Configuration Modules:
- modules/components/quickshell-config.nix - Quickshell options
- modules/components/hyprland-config.nix - Hyprland options
- modules/components/terminal-config.nix - Terminal options

📝 Example Usage:
programs.dots-hyprland = {
  quickshell.bar.utilButtons.showColorPicker = true;
  hyprland.general.gapsIn = 6;
  terminal.colors.alpha = 0.90;
};

🎨 Generated Files:
- ~/.config/quickshell/ii/modules/common/Config.qml (NixOS-managed)
- ~/.config/hypr/general.conf (NixOS-managed)
- ~/.config/foot/foot.ini (NixOS-managed)

✅ Tested: All configurations build and activate successfully
🎉 Ready for production use with full NixOS declarative configuration!

examples/gaming-config.nix

@@ -0,0 +1,75 @@
+# Gaming-optimized configuration for dots-hyprland
+{ config, lib, pkgs, ... }:
+
+{
+  programs.dots-hyprland = {
+    enable = true;
+    source = ./configs;
+    packageSet = "essential";
+    mode = "declarative";
+    
+    # 🎮 Gaming-optimized settings
+    quickshell = {
+      appearance = {
+        transparency = false;  # Disable for performance
+        fakeScreenRounding = 0;  # No rounding
+      };
+      
+      bar = {
+        bottom = true;  # Bottom bar for gaming
+        showBackground = false;  # Minimal UI
+        verbose = false;  # Less clutter
+        
+        utilButtons = {
+          showScreenSnip = false;
+          showColorPicker = false;
+          showMicToggle = true;  # Useful for gaming
+          showKeyboardToggle = false;
+          showDarkModeToggle = false;
+          showPerformanceProfileToggle = true;  # Gaming profiles
+        };
+        
+        workspaces = {
+          shown = 3;  # Only 3 workspaces for gaming
+          showAppIcons = false;  # Minimal
+          alwaysShowNumbers = true;
+        };
+      };
+      
+      battery = {
+        low = 15;  # Lower threshold for gaming
+        critical = 5;
+        automaticSuspend = false;  # Never suspend while gaming
+      };
+      
+      apps = {
+        terminal = "foot";
+        taskManager = "htop";  # Lightweight task manager
+      };
+    };
+    
+    hyprland = {
+      general = {
+        gapsIn = 0;  # No gaps for fullscreen gaming
+        gapsOut = 0;
+        borderSize = 1;  # Minimal borders
+        allowTearing = true;  # Enable for competitive gaming
+      };
+      
+      decoration = {
+        rounding = 0;  # No rounding for performance
+        blurEnabled = false;  # Disable blur for performance
+      };
+      
+      gestures = {
+        workspaceSwipe = false;  # Disable gestures
+      };
+    };
+    
+    terminal = {
+      colors = {
+        alpha = 1.0;  # No transparency for performance
+      };
+    };
+  };
+}