Add Workspace URL with external link 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 a URL field to the expanded workspace cards so that users can quickly access their workspace environment using the existing workspace `url` field from the Workspace GraphQL type.
## Visual Changes
{width=1026 height=610}
## Acceptance criteria
- [ ] Add "URL" section to expanded workspace cards
- [ ] Display workspace URL as clickable link with external link icon
## Implementation plan
- Add URL information section component to expanded workspace card
- Use existing workspace `url` field from GraphQL data
- Display URL as clickable link with external link icon
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issue