Improve the empty state when Workspace Hub finds no repos

[RichardGeorgeDavis]

Summary

Improve the Workspace Hub empty state so a workspace with no useful detected repos gives the user a clear next action.

Problem statement

Right now, a workspace with no detected repos can feel blank or ambiguous. A first-time user should immediately understand where repos belong, what the app scans, and what to do next.

Affected area

• Workspace Hub discovery UI
• Empty-state copy and links
• Possibly one related docs link

Expected outcome

When no useful repos are detected, the UI should explain:

• where repos are expected to live
• what the app scans
• how to onboard or add a repo
• where to find more detailed docs if needed

Constraints or non-goals

• Do not redesign the whole discovery layout
• Do not change runtime or scanning architecture
• Keep the change focused on empty-state clarity

Verification

• Launch Workspace Hub against an empty or fixture workspace
• Confirm the empty state gives a clear next step
• Confirm any linked docs or actions are valid