Deprecate and archive Redspot for the Swanky suite

[hoonsubin]

From my understanding, the Patract Labs team is no longer maintaining this repo and there aren't many activities regarding the project. The last official release was more than a year ago, the supported contract version is outdated, the base node version is at the end of life, and many people still reference Redspot to develop their ink dApps, but they are having problems with using this tool because of its version.

I propose that we deprecate and achieve this repo and use the Swanky Suite instead (https://github.com/AstarNetwork/swanky-cli). The Swanky Suite is an all-in-one Substrate WASM smart contract development tool that was started by Astar Network and is currently being worked with various teams who use ink and WASM smart contracts. We want this tool to gain more community contributions and fill in the gap that Redspot could not.

Let me know what everyone thinks.

[ii-ii-ii]

I had a look at the swanky suite. redspot is mainly used for integration testing, similar to hardhat and waffle on eth, but I don't see these things on swanky.