[Feature] Add runtime type generation for builtin types

[lorenzholzbauer]

Is there an existing proposal for this?

• [X] I have searched the existing issues

This feature does not exist in the latest version

• [X] I am using the latest version

Proposal

class Type {
    constructor(name, fields, methods, baseType = null) {
        this.name = name;
        this.fields = fields;
        this.methods = methods;
        this.baseType = baseType;
    }
}

Exact behaviour / changes you want

• [ ] Implement a runtime type system for built-in types.