Support compact notation

[eemeli]

In some Romance language, compact representations of millions use the many category rather than other. Supporting this requires adding another input argument:

export const fr = (n, c) => {
  const s = String(n).split('.'), i = s[0], v0 = !s[1], i1000000 = i.slice(-6);
  return n >= 0 && n < 2 ? 'one'
    : !c && i != 0 && i1000000 == 0 && v0 || c > 5 ? 'many'
    : 'other';
};