Let select options carry a description, shown on hover and in the picker

Scope & Context Workspaces use SELECT and MULTI_SELECT fields to encode team conventions: a deal's priority, a lead's lifecycle stage, a ticket's severity. The labels are short by design, so what each value means lives somewhere else, in a wiki or in people's heads. New team members guess, and the same record gets tagged differently by different people. Twenty already lets a *field* explain itself: the field description shows in a tooltip on the field label. This issue asks for the same thing one level down, so that each *option* of a select can explain itself. Scope: SELECT and MULTI_SELECT fields, wherever their chips appear (record table, board card, record page), plus the data model settings where options are edited. Current behavior • An option is { id, label, value, position, color }. It has nowhere to store what the value means. • Hovering a select chip shows nothing. • The select picker lists the labels only. • In Settings &…