Add locale support for sortingFn

[magnimarels]

I have been working with data with a lot of non English characters in them and therefore the default sorting does not work as expected for that.

I've gotten around the problem with a custom sortFn:

  export const localeSortFn = () => <T>(rowA: Row<T>, rowB: Row<T>, columnId: string) => {
      return (rowA.getValue(columnId) as string).localeCompare((rowB.getValue(columnId) as string), undefined, {
          numeric: true,
          sensitivity: "base"
      })
  }

That I then call as such in every column where I have strings with non English characters:
sortingFn: localeSortFn()

Should this not be built into the default sorting behavior or at least offer an optional sortingFn along with the current existing ones?