Provide a core types Type (result of typeof)

### ⚙ Compilation target

es2015

### ⚙ Library

none

### Missing / Incorrect Definition

I could not find a type that provides the result of typeof. The workaround is 
```
declare let a: unknown;
const b = typeof a;
type Types = typeof b;
```

### Sample Code

```TypeScript
export function polymorph(type: Types){
switch(type){
///case ...
}
}
```

### Documentation Link

_No response_