Update Requirements

[NazireAta]

📚 Documentation

📝 Description

Based on Customer Milestone 1 feedback, update the requirements:

• [x] to have new subtypes for Tags
• [x] to list by-difficulty filtering features in: Question Search Page, Tag Page
• [x] to have new page for Tag Create
• [x] to have difficulty level in Question Create
• [x] to show difficulty level in Question Page
• [x] to show different fieldsets for each Tag type
• [x] to list the fieldsets for each Tag type.

👁‍🗨 Reviewer

@mmtftr

[NazireAta]

updated the requirements docs.