Update dg

[juliantayyc]

1. Removed undo proposed implementation
2. Updated:

• Target User Profile (resolves [PE-D][Tester D] Inconsistency in documentation  #203)
• Value Proposition (resolves [PE-D][Tester A] Value proposition does not align with product features #246)
• User Stories (resolves [PE-D][Tester C] Questionable User #238, resolves [PE-D][Tester C] Missing Add Module user story #234, resolves [PE-D][Tester C] User Story benefits are the same #233, resolves [PE-D][Tester C] Inconsistent User Story #232)
• Use Cases (resolves [PE-D][Tester A] UI information in use case could be omitted #248, resolves [PE-D][Tester B] Vague use case exception scenario #214)
• Instructions for Manual Testing (resolves [PE-D][Tester A] Instructions for manual testing in DG not updated #250)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

[ethan-goh]

LGTM