chore: add CodeCoverage folder to gitignore

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Signed-off-by: JasonXuDeveloper - 傑 <jason@xgamedev.net>

Author: JasonXuDeveloper

.gitignore

@@ -29,3 +29,4 @@ UnityProject/Build/*
 .worktrees/
 .security-key
 logs/security/
+/UnityProject/CodeCoverage