Add string type to shape in `reshape`

[sergeysova]

const $data = createStore({ foo: 1, bar: 2 })

const { wow, demo } = reshape({
  source: $data,
  shape: {
    wow: "foo",
    demo: (obj) => obj.bar,
  },
})

[sergeysova]

Shorthands:

const $data = createStore({ foo: 1, bar: 2 })

const { foo, bar } = reshape({
  source: $data,
  shape: ["foo", "bar"],
})