Mention tool integration in documentation: IDE, CI, mocking ?

As the subject of integrating with IDEs, mocking frameworks and continuous integration frameworks has come up before, it may be helpful to mention these in the documentation, e.g. plans, or where to find further info.

Start by locating the documentation sections covering plans or further information, then check how IDEs, mocking frameworks, and continuous integration frameworks are currently discussed. Done means the relevant documentation mentions these integrations and points readers to further information where available.

Written by the indexing model from the issue text.