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/performance/default.nix

@@ -0,0 +1,70 @@
+# Performance optimizations
+{
+  config,
+  lib,
+  pkgs,
+  nomarchyConfig,
+  ...
+}: {
+  # Zram swap for better memory management
+  zramSwap = {
+    enable = true;
+    algorithm = "zstd";
+    memoryPercent = 50;
+  };
+
+  # Tmpfs for /tmp (faster, auto-cleans)
+  boot.tmp = {
+    useTmpfs = true;
+    tmpfsSize = "50%";
+  };
+
+  # Kernel parameters for performance
+  boot.kernelParams =
+    [
+      "quiet"
+      "splash"
+    ]
+    # SECURITY WARNING: mitigations=off disables CPU vulnerability protections
+    # Only enable if you understand the security implications
+    ++ lib.optionals (nomarchyConfig.enableMitigationsOff or false) [
+      "mitigations=off"
+    ];
+
+  # Better I/O scheduler for SSDs
+  services.udev.extraRules = ''
+    ACTION=="add|change", KERNEL=="sd[a-z]*|nvme[0-9]*", ATTR{queue/scheduler}="mq-deadline"
+  '';
+
+  # Kernel sysctl tuning
+  boot.kernel.sysctl = {
+    # Increase inotify watches for large projects (IDEs, file watchers)
+    "fs.inotify.max_user_watches" = 524288;
+    "fs.inotify.max_user_instances" = 1024;
+
+    # Memory management
+    "vm.swappiness" = 10;           # Prefer RAM over swap
+    "vm.vfs_cache_pressure" = 50;   # Balance inode/dentry cache
+  };
+
+  # Nix garbage collection
+  nix.gc = {
+    automatic = true;
+    dates = "weekly";
+    options = "--delete-older-than 7d";
+  };
+
+  # Nix store optimization
+  nix.settings = {
+    auto-optimise-store = true;
+    max-jobs = "auto";
+    cores = 0;  # Use all cores
+  };
+
+  # Earlyoom to prevent OOM freezes
+  services.earlyoom = {
+    enable = true;
+    freeMemThreshold = 5;
+    freeSwapThreshold = 10;
+  };
+}