Feat: Assignment 4 submission

[R-Jim]

• [x] Use nextjs app router
• [x] Updated project structure
• [x] Update CSS to tailwind css
• [x] Add custom 404 page
• [x] Add light and dark mode with tailwind css
• [x] Enhance search, pagination with query params

[vercel[bot]]

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Name	Status	Preview	Updated (UTC)
df-frontend-2023-assignment1	✅ Ready (Inspect)	Visit Preview	Oct 7, 2023 4:39am
df-frontend-2023-assignment2	✅ Ready (Inspect)	Visit Preview	Oct 7, 2023 4:39am
df-frontend-2023-assignment3	✅ Ready (Inspect)	Visit Preview	Oct 7, 2023 4:39am