Fix compilation errors in iOS Roblox executor

[backup-bdg-4]

This PR fixes compilation errors in the iOS Roblox executor by:

• Fixing unused variable warnings in VM source files
• Improving the build script with better organization and error handling
• Adding proper force_load flags to ensure all symbols from static libraries are included
• Setting proper install_name for the dynamic library
• Fixing include paths in hooks.hpp

These changes should resolve the linker errors shown in the build logs.

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