Add FrameLayoutKit to Layout section

[kennic]

• Project Name: FrameLayoutKit
• Project URL: https://github.com/kennic/FrameLayoutKit
• Project Description: This framework supports complex layouts, including chaining and nesting layout with simple and intuitive operand & DSL syntax.
• Why it should be added to awesome-swift:
• [x ] At least 15 stars (GitHub project)
• Support Swift 5
• Updated contents.json instead of README
• Lib is fully open sourced, written in Swift and not a wrapper over compiled lib
• Description does not say "written in Swift" or variant 🤓

[matteocrippa]

@kennic looks fine can you just drop the changes for the Readme file?

[kennic]

@kennic looks fine can you just drop the changes for the Readme file?

done, thank you!

[vpeschenkov]

@kennic thx 👍