Joining A Samsung TV Hub to an existing OTBR Thread network

This is based on OTBR running on Home Assistant and a Samsung S90C updated to FW 6500 (Tizen 9 update which brings Thread 1.4 support).

1. First SSH into your home assistant host. make sure OTBR addon is running.
   1. Run docker ps | grep router`, note the random id at the start.
   2. Run docker exec -it <id from previous step> /bin/bash
      1. Run ot-ctl
         1. Run ba ephemeralkey generate-tap, take note of the random 9 digit key.
         2. Run ba ephemeralkey start <9 digit key from previous step> 300000
2. On your SmartThings app, click the Hub in "Devices". Click top right ellipses menu -> "Settings" -> "Manage Thread network" -> "Unify Thread network" -> "Join this hub to another Thread network" -> Enter the 9 digit key from the generate-tap command from before.

Voila! You should now have one less thread network 🎊