Support generation of xcodeproj file

[enfipy]

Helping links:

• https://github.com/CocoaPods/Xcodeproj
• https://github.com/tuist/XcodeProj
• http://www.monobjc.net/xcode-project-file-format.html
• https://crates.io/crates/cargo-xcode
• https://github.com/fstephany/xcodeproj-rs
• https://github.com/kronenthaler/mod-pbxproj
• https://github.com/Karumi/Kin
• https://github.com/CocoaPods/Xcodeproj
• https://github.com/yonaskolb/XcodeGen

See also:

• https://github.com/chinedufn/swift-bridge
• https://github.com/nvzqz/swift-bindgen