Zustand Store for User Profile Management

[leoAshu]

🚀 Summary

This PR sets up a Zustand store to manage user profile information retrieved from Supabase.

It enables fetching and updating profile data from the profile screen and ensures the state remains in sync with the backend.

🧩 Related Issues / Tasks

• Closes [FEATURE] Zustand Store for User Profile Management #36

🛠️ Type of Change

• 🐞 Bug fix
• ✨ New feature
• 🧨 Breaking change
• 🔨 Enhancement/Refactor
• 📝 Documentation
• 📜 Other (please describe):

✅ Checklist

• The code is formatted with Prettier (npm run format or npx prettier --write .)
• PR references a linked Issue or Task number
• Tested on both iOS and Android devices/emulators
• No unnecessary logs or commented-out code
• UI changes, if any, have been reviewed visually
• All tests are passing (if applicable)
• Added or updated documentation where necessary

📸 Screenshots / Videos (UI changes only)

N/A

🧪 Test Plan

• Verified that the profile data is fetched on visiting /profile route.
• Edited and saved profile data via a form.
• Confirmed the data was updated in Supabase and local state reflected the change.