Simplified Permission System

What: Migrated ignorePatterns configuration to unified permissions system.

Details:

• The ignorePatterns field is automatically migrated to permission rules on first run
• After successful migration, ignorePatterns is removed from config file
• Runtime file access checking now uses unified xC() permission function instead of separate GN() ignore checker
• Behavior remains the same - patterns still block file access, just through the permissions infrastructure
• Evidence: u6A() at line 474347 (simplified from IsA()), se2() at line 487463 (migration with cleanup at line 487480)