Update README.md

Author: ufechner7

README.md

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 # SimpleKiteControllers
 
 [![Build Status](https://github.com/OpenSourceAWE/SimpleKiteControllers.jl/actions/workflows/CI.yml/badge.svg?branch=main)](https://github.com/OpenSourceAWE/SimpleKiteControllers.jl/actions/workflows/CI.yml?query=branch%3Amain)
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+## TODO
+- add the new, dual loop parking controller (see: [parking_controller.jl](https://github.com/aenarete/KiteControllers.jl/blob/main/examples/parking_controller.jl))
+- implement a new path following controller for flying figures of eight, see[Fernandes_2022](https://www.mdpi.com/1996-1073/15/4/1390)