docs: Documentation only changes

[ade555]

What does this PR do?

Updates the documentation for the student dashboard.

Fixes #369

Type of change

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] Chore (refactoring code, technical debt, workflow improvements)
• [ ] 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
• [ x] This change updates the documentation of existing features

Checklist

Required

• [ ] 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

Side Note

I ignored documenting anything about the profile settings since they do not directly affect the student's learning experience. If you'd like me to change this, please let me know and I'll be happy to do it.