Dependency version upgrades

[mika018]

• [x] upgrade nextjs major version: 12 -> 14
• [x] upgrade supbase major version: 1 -> 2
• [x] restructure project to use app directory rather than pages
• [x] enable server side rendering and migrate authentication to server

[vercel[bot]]

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Name	Status	Preview	Comments	Updated (UTC)
app-next	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 8, 2024 7:31pm