message: add Details props docs
diff: <ExampleHeading>With render prop</ExampleHeading>
  <Details render={() => 'hi'} />
  ```
  +
  +## System props
  +
  +Details components get `COMMON` system props. Read our [System Props](/system-props) doc page for a full list of available props.
  +
  +## Component props
  +
  +| Prop name | Type | Description |
  +| :- | :- | :- |
  +| open | Boolean | Sets the open/closed state of the Details component |
  +| render | Function | Optional render function as a prop, to allow you to handle toggling and open/closed state within a container component
  +
  export const meta = {displayName: 'Details'}
  