Upgrade Stellar Wallet Kits to the latest version

[quietbits]

https://stellarwalletskit.dev/

[jeesunikim]

this is still in beta version, but enrique confirmed that it's stable

[jeesunikim]

I created an issue on their library end Creit-Tech/Stellar-Wallets-Kit#79. React hydration error occurs because the library is adding an inline style which causes an error with nextjs' SSR.

I think we should update this when they release a stable version v2.