fix: dynamic flake path resolution and replace env-update/sys-update aliases with scripts

themes/engine/scripts/nomarchy-font-set

@@ -20,7 +20,7 @@ if fc-list | grep -iq "$font_name"; then
   TMP_JSON=$(mktemp)
   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
+  nomarchy-env-update
 
   # Instant feedback for certain apps via IPC
   if pgrep -x kitty; then