Sepolia Testnet v2 preview - v2.0rc2

[chimera-defi]

Sepolia testnet v2 RC2 preview

https://pr-210.d1nqknlekhlwny.amplifyapp.com/

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[chimera-defi]

todo - onboard js fixe. not sure if the network thing is used. address is showing up now tho and connect works sorta. need to

1. add goerli
2. live test on goerli that buttons still work