test: unit tests of steam-shortcuts.py and steamify-notifier.py

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Ss5gKj7XG5JPi27XwGBGTs

tests/python-test.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+# Unit tests of the Python helpers in steamify-cachyos/patches (steam-shortcuts.py,
+# steamify-notifier.py). No root, VM or hardware needed: bash tests/python-test.sh
+# The Steamify checkout (REPO, default: the steamify-cachyos next to this repo)
+REPO="${REPO:-$(cd "$(dirname "$0")/../../steamify-cachyos" && pwd)}"
+export REPO
+cd "$(dirname "$0")/.." || exit 1
+if python3 -B -m unittest tests/patches_test.py 2>&1 | tail -n 25 | tee /dev/stderr | grep -q '^OK'; then
+    echo "ok   Python helpers"
+else
+    echo "FAIL Python helpers"; exit 1
+fi