Add workspace description section to expanded workspace list card
MR: Pending
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## Description
As part of our [new designs for Workspaces](https://gitlab.com/groups/gitlab-org/-/epics/18674), we need to add an editable description section to the expanded workspace cards so that users can view their workspace descriptions. This section will use the field created in https://gitlab.com/gitlab-org/gitlab/-/issues/562374+s
## Visual Changes
{width=972 height=84}
## Acceptance criteria
- [ ] Add "Description" section to expanded workspace cards
- [ ] Display current workspace description
## Implementation plan
- Add description section component to expanded workspace card
- Update GraphQL query to include `description` field from workspace type
- Display description text
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issue