Add Unity Test Framework temporary test scenes to .gitignore

Unity Test Framework creates temporary scenes like InitTestScene<timestamp>.unity
when running play mode tests. These should not be committed to the repository.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: JasonXuDeveloper

.gitignore

@@ -17,6 +17,10 @@ UnityProject/Build/*
 /UnityProject/HybridCLRData
 /UnityProject/UserSettings
 
+# Unity Test Framework temporary scenes
+/UnityProject/Assets/InitTestScene*.unity
+/UnityProject/Assets/InitTestScene*.unity.meta
+
 # Auto Claude generated files
 .auto-claude/
 .auto-claude-security.json