Add corpus collection guidelines

Description:

Added guidelines section in the UI that shows guidelines for contributing to the corpus. In the file upload section, added a checkbox to prompt users to proceed with upload after going through the guidelines.

Type of Change:

• Feature Development

Testing:

• Tested on desktop
• Tested in different browsers

Screenshots (if applicable):

Video Demo

https://drive.google.com/file/d/1pKm5P2pWO0mWhEfG6DAHziFBmC2Q5CAo/view?usp=sharing

Checklist:

• Code follows project style guidelines
• Self-review completed
• No console errors
• TypeScript types are correct