Create workspace details page foundation with routing and breadcrumb navigation

MR: Pending

Description

To improve the workspace failure visibility & troubleshooting, we need to create a new dedicated workspace details page with proper routing and navigation so that users can view the error logs for individual workspaces in a dedicated view.
This view will also be utilised later to display the system information & perform relevant actions for a workspace, as part of the new designs for Workspaces.

Visual Changes

Acceptance criteria

• New route for workspace details page (e.g., /workspaces/:id)
• Implement basic page layout structure
• Make sure that the layout has breadcrumb navigation implemented same as rest of GitLab
• Add links for this details page to individual workspaces in workspace list
• Handle invalid workspace IDs with proper error states

TODO: Implementation plan