- Replaced direct calls to `rom_->LoadFromData` with `ASSERT_OK` assertions in `OverworldIntegrationTest` and `OverworldV3IntegrationTest` to enhance error handling and ensure robust test execution.
- This change aligns with recent improvements in error management across the testing framework.
- Introduced new E2E test suite for comprehensive ROM testing, validating the complete ROM editing workflow.
- Added ZSCustomOverworld test suite to validate version upgrades and data integrity.
- Updated `EditorManager` to register the new test suites.
- Enhanced CMake configuration to include the new test files.
- Updated README to reflect the new testing capabilities and best practices for AI agent testing.
