Fix error that occur when creating XCFramework

Background

• Public header issue occurs when using Objective-C package in Tuist's Dependency. To resolve this issue, I want to provide xcframework.
• Resolve the issue that occurs when creating xcframework due to duplicate 'postfix operator %'.

Contents

• remove unnecessary files and headers
  • Modified to manage yoga directly in FlexLayout. Buck dependency is now unnecessary.
• remove duplicated postfix operator
• update Podfile.lock
• remove Info.plist
• move FlexLayout.h to public header directory

Added by OhKanghoon in Pull Request #244