feat(core): migrate system state to unified declarative JSON

- Consolidate all configuration toggles (suspend, idle, waybar, etc.) into ~/.config/home-manager/state.json
- Introduce nomarchy.toggles and nomarchy.hyprland options in Nix
- Inject toggle states into all bin/ scripts via environment variables
- Update toggle scripts to mutate JSON and trigger background rebuilds
- Add a migration script to transition legacy flag files to the new format

bin/nomarchy-font-set

@@ -11,12 +11,14 @@ if [[ -z $font_name ]]; then
 fi
 
 STATE_DIR="$HOME/.config/home-manager"
-STATE_FILE="$STATE_DIR/font-state.nix"
+STATE_FILE="$STATE_DIR/state.json"
 
 mkdir -p "$STATE_DIR"
+[[ ! -f $STATE_FILE ]] && echo "{}" > "$STATE_FILE"
 
 if fc-list | grep -iq "$font_name"; then
-  echo "$font_name" > "$STATE_FILE"
+  TMP_JSON=$(mktemp)
+  jq ".font = \"$font_name\"" "$STATE_FILE" > "$TMP_JSON" && mv "$TMP_JSON" "$STATE_FILE"
   echo "Font set to $font_name declaratively. Applying changes..."
   env-update