feat: added the starsearch-workspaces feature flag to the app

[nickytonline]

Description

Adds the starsearch-workspaces feature flag to the project.

Related Tickets & Documents

Closes #3589

Mobile & Desktop Screenshots/Recordings

Steps to QA

N/A

Tier (staff will fill in)

• [ ] Tier 1
• [ ] Tier 2
• [ ] Tier 3
• [x] Tier 4

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