Retro add user ready status

[StevenWeathers]

Description

Adds user ready status to Retro phase

What type of PR is this? (check all applicable)

• [x] 🍕 Feature
• [ ] 🐛 Bug Fix
• [ ] 📝 Documentation Update
• [ ] 🎨 Style
• [ ] 🧑‍💻 Code Refactor
• [ ] 🔥 Performance Improvements
• [ ] ✅ Test
• [ ] 🤖 Build
• [ ] 🔁 CI
• [ ] 📦 Chore (Release)
• [ ] ⏩ Revert

Related Tickets & Documents

Resolves #506

Screenshots/Recordings

Steps to QA

Go to Retro Brainstorming phase, click the Thumbs Up below your name to mark yourself as done brainstorming/ready for next phase. Click again if you need to unmark your done status.