[Migrating] Mention ts-fix among useful tools

[pjonsson]

What cheatsheet is this about? (if applicable)

Migrating cheatsheet

What's your issue or idea?

Ts-fix is a CLI for applying TypeScript codefixes, and I feel that should be mentioned among the useful tools.

Source repository here: https://github.com/microsoft/ts-fix

To automatically fix an issue, enable some more warnings in tsconfig.json and run like this:

ts-fix -t ./tsconfig-with-more-warnings.json -e 7006 --write --ignoreGitStatus --file src/**/*.ts

The 7006 code is to apply the fix that adds type annotations on parameters with an implicit any type. There might be a better way to find the code for the fix, I just look here and search for some part of the error message from the compiler: https://github.com/microsoft/TypeScript/blob/main/src/compiler/diagnosticMessages.json.