fix: undefined org name in student invite link + community

[rotimi-best]

What does this PR do?

Fixes a couple of issues I saw when having a live demo with Matthew.

1. Student can't ask question or leave comments
2. Infinite spinner when validation of new question failed
3. goto was undefined.

I also added a couple of improvements:

1. Admins can delete questions they created or the ones student created
2. Students can now delete their own questions
3. Snackbar notification when something is deleted

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

How should this be tested?

• Open LMS
• Go to community
• Ask a question
• Leave comments

Checklist

Required

• Filled out the "How to test" section in this PR
• Self-reviewed my own code
• Commented on my code in hard-to-understand bits
• Ran pnpm build
• Checked for warnings, there are none
• Removed all console.logs
• Merged the latest changes from main onto my branch with git pull origin main
• 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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[github-actions]

Thank you for following the naming conventions for pull request titles! 🙏