Hello there! 
With the rise of ethers and viem, came really cool “Modal libraries” to help connect to dapps. React-celo, formerly known as use-contractkit is one such library. But as time went, we deem that other libraries just did it better, so we wrote up a little migration guide to help refactor your dapp from away from react-celo, replacing it with rainbowkit.
You can find react-celo->rainbowkit guide in this PR: docs: add migration notes from react-celo by nicolasbrugneaux · Pull Request #363 · celo-org/react-celo · GitHub
And it’ll be merged on the master branch soon enough.