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>

bin/system/nomarchy-setup-dns

@@ -13,7 +13,7 @@ fi
 
 case "$dns" in
 Cloudflare|Google|DHCP)
-  sudo jq ".dns = \"$dns\"" "$STATE_FILE" > /tmp/state.json && sudo mv /tmp/state.json "$STATE_FILE"
+  sudo jq --arg dns "$dns" '.dns = $dns' "$STATE_FILE" > /tmp/state.json && sudo mv /tmp/state.json "$STATE_FILE"
   ;;
 
 Custom)
@@ -24,10 +24,10 @@ Custom)
     echo "Error: No DNS servers provided."
     exit 1
   fi
-  
-  # Convert to JSON array
+
+  # Convert to JSON array safely
   dns_array=$(echo "$dns_servers" | jq -R 'split(" ")')
-  sudo jq ".dns = \"Custom\" | .customDns = $dns_array" "$STATE_FILE" > /tmp/state.json && sudo mv /tmp/state.json "$STATE_FILE"
+  sudo jq --arg dns "Custom" --argjson servers "$dns_array" '.dns = $dns | .customDns = $servers' "$STATE_FILE" > /tmp/state.json && sudo mv /tmp/state.json "$STATE_FILE"
   ;;
 esac