refactor: major architectural restructure for theme-centric organization

Theme System:
- Move all theme app configs to apps/ subdirectory (20 themes)
- Add theme-loader.nix for dynamic theme config deployment
- Simplify stylix.nix to focus on base theming only

Override System:
- Add overrides.nix for file-based config overrides
- Add behavior-configs.nix for non-visual configuration
- Split hypr/nomarchy.conf into behavior vs visual sections

Module Improvements:
- Add lib.mkDefault to all customizable settings
- Add modules/lib/ with shared utilities and state schema
- Update all home and system modules for downstream overridability

Installer:
- New minimal TTY installer (installer/install.sh)
- Golden path: BTRFS + LUKS2 (disko-golden.nix)
- New installer-iso.nix for TTY-only installation
- Keep graphical installer as installerIsoGraphical option

Cleanup:
- Remove obsolete install.sh, disko-ext4.nix, install-nomarchy.sh
- Update live-iso.nix references
- Add .claude/ to .gitignore for local IDE settings

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

modules/system/state.nix

@@ -1,16 +1,8 @@
 { lib, ... }:
 
 let
-  stateFile = "/etc/nixos/state.json";
-  
-  # Helper to read state from a file, with a default
-  readState = file: default:
-    if builtins.pathExists file then
-      builtins.fromJSON (builtins.readFile file)
-    else
-      default;
-
-  systemState = readState stateFile {};
+  nomarchyLib = import ../lib { inherit lib; };
+  systemState = nomarchyLib.readSystemState;
 in
 {
   config.nomarchy.system = {