Refer to official docs

[KronosTheLate]

Currently, I is not clear if this README is the best and updated source for documentation for TerminalMenus. To me, it would feel more appropriate to replace the readme with a short description of the history and scope of the package, and then just link to the official docs.

Would you agree? Because the current situation feels like it is split between this package and the official docs, and the maintenance burden is doubled (right)?