Update OpenRenderBox folder structure and add utilities

[Kyle-Ye]

Summary

• Reorganized header file structure to use OpenRenderBox and OpenRenderBoxCxx subdirectories
• Added bump scripts for DarwinPrivateFrameworks integration
• Updated ORBVersion implementation
• Fixed include paths throughout the codebase
• Added CxxTests target for testing

Changes

• Moved all public headers to include/OpenRenderBox/ subdirectory
• Moved C++ headers to include/OpenRenderBoxCxx/ subdirectory
• Added Scripts/bump_rb_pr.sh and Scripts/gen_rb_template.sh for dependency management
• Updated Package.swift with new include paths and test targets
• Added module.modulemap for proper module support
• Fixed all include statements to use new paths