refactor: implement component-based architecture for enhanced maintainability

- Reorganize directory structure into core/, features/, and themes/
- Colocate application Nix logic, configs, scripts, and theme overrides
- Implement 'Inversion of Control' for theming: apps now pull theme-specific layouts
- Update flake.nix and shared library paths to match the new structure
- Document the new Feature-Centric architecture in README.md

features/apps/scripts/nomarchy-launch-screensaver

@@ -0,0 +1,56 @@
+#!/bin/bash
+
+# Launch the Nomarchy screensaver in the default terminal on the system with the correct font configuration.
+
+# Exit early if we don't have the tte show
+if ! command -v tte &>/dev/null; then
+  exit 1
+fi
+
+# Exit early if screensave is already running
+pgrep -f org.nomarchy.screensaver && exit 0
+
+# Allow screensaver to be turned off but also force started
+# Skip if screensaver is disabled in configuration
+if [[ $NNOMARCHY_TOGGLE_SCREENSAVER == "false" ]] && [[ $1 != "force" ]]; then
+  exit 0
+fi
+
+
+# Silently quit Walker on overlay
+walker -q
+
+focused=$(hyprctl monitors -j | jq -r '.[] | select(.focused == true).name')
+terminal=$(xdg-terminal-exec --print-id)
+
+for m in $(hyprctl monitors -j | jq -r '.[] | .name'); do
+  hyprctl dispatch focusmonitor $m
+
+  case $terminal in
+  *Alacritty*)
+    hyprctl dispatch exec -- \
+      alacritty --class=org.nomarchy.screensaver \
+      --config-file ~/.local/share/nomarchy/default/alacritty/screensaver.toml \
+      -e nomarchy-cmd-screensaver
+    ;;
+  *ghostty*)
+    hyprctl dispatch exec -- \
+      ghostty --class=org.nomarchy.screensaver \
+      --config-file=~/.local/share/nomarchy/default/ghostty/screensaver \
+      --font-size=18 \
+      -e nomarchy-cmd-screensaver
+    ;;
+  *kitty*)
+    hyprctl dispatch exec -- \
+      kitty --class=org.nomarchy.screensaver \
+      --override font_size=18 \
+      --override window_padding_width=0 \
+      -e nomarchy-cmd-screensaver
+    ;;
+  *)
+    notify-send -u low "✋  Screensaver only runs in Alacritty, Ghostty, or Kitty"
+    ;;
+  esac
+done
+
+hyprctl dispatch focusmonitor $focused