Supabase authentication

[jmathew12]

Summary & Changes 📃

• Resolves: Feature Request: Implement authentication #168

• Summary: (Briefly describe what this PR does)

  • 🔨 What does this issue fix?
  • 👀 What is the expected behavior?
  • 🗨️ Any relevant technical details?

• Changes:

  • ✅ List key changes made
  • 🛠️ Mention breaking changes (if any)
  • 🔗 Link relevant discussions/issues
  • 📝 Additional info to assist developers & reviewers

Screenshots / Visual Aids 🔎

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How to Test 🧪

1. Steps to Reproduce:
   • Step 1: ...
   • Step 2: ...
2. Expected Behavior: (Describe what should happen)
3. Actual Behavior (if bug): (Describe what happens instead)

Checklist ✅

• I have tested this PR locally and it works as expected.
• This PR resolves an issue (Resolves #issue-number).
• Reviewers, assignees(self), tags, and labels are correctly assigned.
• Squash commits and enable auto-merge if approved.