Writeable
Removes readonly from array or tuple literal types.
Example
const test = [1, 2, 3] as const
const test2 = { a: 'a', b: 'b' } as const;
type Test = Writeable<typeof test>; // [1, 2, 3]
type Test2 = Writeable<typeof test2>; // { a: 'a', b: 'b' }