Update wiki to include Ticketing documentation

[mlschindler]

Wiki page on Ticketing is blank. Would be nice to see this filled out as we roll out the sensors and stand up the orchestration server.

Thanks!

[mr-burnse]

Will tackle this some time over the next few weeks. In the interim, check out the youtube demo video which covers how ticketing works or feel free to ping me in the slack room if you have any specific questions.