[Feature] Migration-related practical documents

[shuqingzai]

The GoClaw source code repository contains a lot of useful documentation, but this documentation is not available on the documentation website. Users must search the GoClaw source code repository (assuming they know these documents exist), which increases the burden on user experience and development. Could all the useful documentation be consolidated into docs.goclaw.sh ?

Example: https://github.com/nextlevelbuilder/goclaw/blob/main/docs/13-ws-team-events.md