Add page about Catchain ## Reference - https://habr.com/ru/company/mercuryo/blog/490392/ - https://docs.ton.dev/86757ecb2/p/07ddda-walk-through-the-catchain/t/43bd4e - https://www.google.com/search?q=Catchain - https://github.com/tonlabs/ton-labs-node/blob/master/catchain/README.md - https://everscale-community.medium.com/walkthrough-the-catchain-6fb4d25b1d3
Add page about Catchain
Reference