Initial commit: Nomarchy NixOS configuration

An opinionated NixOS configuration with Hyprland, featuring:

- Modular flake-based architecture
- Parameterized user configuration (username, timezone, locale, etc.)
- Classical/antiquity theme with Thomas Cole wallpapers
- Full Hyprland setup with waybar, rofi, swaync
- Custom utility scripts (screenshots, screen recording, WiFi QR)
- Neovim with LSP support
- Interactive installer for existing NixOS systems
- ISO builder for fresh installations

Flake outputs:
- nixosConfigurations.example - Test configuration
- nixosConfigurations.installer - ISO installer
- packages.iso - Bootable ISO image
- apps.default - Interactive installer
- lib.mkHost - Host builder function
- templates.default - Starter template

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

modules/core/networking.nix

@@ -0,0 +1,34 @@
+# Networking configuration
+{
+  config,
+  lib,
+  pkgs,
+  nomarchyConfig,
+  ...
+}: {
+  # NetworkManager with iwd backend (better WiFi handling)
+  networking.wireless.enable = false;
+  networking.networkmanager = {
+    enable = true;
+    wifi.backend = "iwd";
+  };
+
+  # Firewall - enabled by default, ports configurable
+  networking.firewall = {
+    enable = true;
+
+    # Syncthing ports (if enabled)
+    allowedTCPPorts = lib.optionals (nomarchyConfig.enableSyncthing or true) [
+      8384   # Syncthing GUI
+      22000  # Syncthing transfer
+    ];
+
+    allowedUDPPorts = lib.optionals (nomarchyConfig.enableSyncthing or true) [
+      22000  # Syncthing transfer
+      21027  # Syncthing discovery
+    ];
+  };
+
+  # DNS resolution
+  services.resolved.enable = true;
+}