Select: Type improvements

[jamcry]

• If we are not already exporting the new types from index, we should export them, like we do for other component types

• Previously, DropdownOption was generic, so we were able to type its Id and Context, like this: DropdownOption<UserType>. But with Select changes, we lost this feature.

  Before:

  export interface DropdownOption<Id = string, Context = any> {
    id: Id;
    title: string;
    customClassName?: string;
    CustomContent?: JSX.Element;
    icon?: React.ReactNode;
    subtitle?: string;
    context?: Context;
    isDisabled?: boolean;
  }

  Now:

  interface Option {
    id: string;
    isDisabled?: boolean;
  }

  We should try to restore this.