call and apply

Implement two standalone functions that run fn with a chosen this:

• myCall(fn, thisArg, ...args) passes the arguments one by one.
• myApply(fn, thisArg, args) takes the arguments as one array or array-like (an object with length and numbered keys). A missing or null args means no arguments.

Both return whatever fn returns. Rules:

• Don't use Function.prototype.call, apply or bind, and don't use Reflect.apply. Don't modify Function.prototype.
• If thisArg is null or undefined, run fn with globalThis as this. A primitive thisArg such as 2.25 is wrapped in its object form, so number methods still work on it.
• thisArg must look exactly the same afterwards: no leftover properties, even if fn throws. It may already have a property with any name, such as fn.
• If fn is not a function, throw a TypeError.