refactor: start scripts as patches files, LED driver install in steps

patches/steamify-app-start.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+# Installed by Steamify CachyOS: start the newest release of its app.
+set -o pipefail
+if [[ "${1:-}" != --in-terminal ]] && ! python3 -c 'import PySide6.QtQml' 2>/dev/null; then
+    exec konsole -e "$0" --in-terminal
+fi
+if ! curl -fsSL --max-time 30 "@URL@" | bash; then
+    msg="Couldn't download or start Steamify. Are you connected to the internet?"
+    if [[ "${1:-}" == --in-terminal ]]; then echo; echo "$msg"; read -rp "Press Enter to close this window... " _
+    else kdialog --title Steamify --sorry "$msg" 2>/dev/null; fi
+    exit 1
+fi