Created Future plans TODO (markdown)

Future-plans-TODO.md

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+- Support for more devices and devices with built-in OLED screen (merge from [branch](https://github.com/RadioHome/esp32_loraprs/tree/oled))
+- Investigate support for [M17 Protocol](http://m17project.org) reflector gating in addition to APRS-IS when M17 protocol is used by the client application
+- Improve CSMA logic and if possible add support for CAD