Add support for Magik

[sebastiaanspeck]

Language

Magik is an object-oriented programming language that supports multiple inheritance and polymorphism, and it is dynamically typed

Additional resources

https://github.com/sebastiaanspeck/highlightjs-magik

https://github.com/krn-robin/tree-sitter-magik