fix: Prevent hypen at start or end of organzation or domain name

[codiini]

What does this PR do?

Fixes #336

Type of change

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] Chore (refactoring code, technical debt, workflow improvements)
• [x] Enhancement (small improvements)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change adds a new database migration
• [ ] This change requires a documentation update

How should this be tested?

• Create a new account and go through the onboarding process. Try to start or end the organization name using hyphens
• Go to the settings page, try to update the organization name or domain and try using hyphens at either the start or end.
• To confirm other functionalities still work, I updated the user avatar

Checklist

Required

• [x] Filled out the "How to test" section in this PR
• [x] Self-reviewed my own code
• [ ] Commented on my code in hard-to-understand bits
• [ ] Ran pnpm build
• [x] Checked for warnings, there are none
• [ ] Removed all console.logs
• [x] Merged the latest changes from main onto my branch with git pull origin main
• [x] My changes don't cause any responsiveness issues

Appreciated

• [ ] If a UI change was made: Added a screen recording or screenshots to this PR
• [ ] Updated the ClassroomIO Docs if changes were necessary

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