update routing and add more pages and implement join team button

[Codesmith28]

• Add join button functionality to Groups component
• try implementing join button (does not work)
• Fix typo in ProfileCard component
• another attempt to make join button work
• Fix team join functionality to prevent duplicates
• Update Navbar NavLink href to include child component name

[vercel[bot]]

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Name	Status	Preview	Comments	Updated (UTC)
leetcode-leaderboard	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Nov 24, 2023 4:02am