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/appearance/nomarchy-font-set

@@ -10,7 +10,7 @@ if [[ -z $font_name ]]; then
   exit 1
 fi
 
-STATE_DIR="$HOME/.config/home-manager"
+STATE_DIR="$HOME/.config/nomarchy"
 STATE_FILE="$STATE_DIR/state.json"
 
 mkdir -p "$STATE_DIR"
@@ -18,19 +18,19 @@ mkdir -p "$STATE_DIR"
 
 if fc-list | grep -iq "$font_name"; then
   TMP_JSON=$(mktemp)
-  jq ".font = \"$font_name\"" "$STATE_FILE" > "$TMP_JSON" && mv "$TMP_JSON" "$STATE_FILE"
+  jq --arg font "$font_name" '.font = $font' "$STATE_FILE" > "$TMP_JSON" && mv "$TMP_JSON" "$STATE_FILE"
   echo "Font set to $font_name declaratively. Applying changes..."
   env-update
-  
+
   # Instant feedback for certain apps via IPC
   if pgrep -x kitty; then
     pkill -USR1 kitty
   fi
   if pgrep -x ghostty; then
     pkill -SIGUSR2 ghostty
-    notify-send -u low "    You must restart Ghostty to see font change"
+    notify-send -u low "    You must restart Ghostty to see font change"
   fi
-  
+
   nomarchy-hook font-set "$font_name"
 else
   echo "Font '$font_name' not found."