Action catalog types

interface ActionDomainOption {
    value: string;  // canonical domain key (e.g. 'light', 'switch')
    label: string;
  }

interface ActionServiceOption {
    value: string;  // canonical service name (e.g. 'turnOn', 'setLevel')
    label: string;
    description?: string;
  }

interface ActionServiceParameter {
    /** Settings key (and serviceData property) the parameter writes to. */
    key: string;
    label: string;
    type: 'number' | 'string' | 'boolean' | 'enum';
    required?: boolean;
    min?: number;
    max?: number;
    options?: Array<{ value: string | number; label: string }>;
    description?: string;
  }