Competition tool docs revamp

[resir014]

Hello @TonaTM + @magnetik,

As promised, here is the initial shipment of the Competition Tool docs revamp. I've made it so it is structured like this:

• Step-by-step guides on how to create a competition
• Administrative guides which shows how to add players/teams, server commands, (still missing: server management)
• Reference of all the available structure JSON objects, plugin settings, as well as zone strings

Note that I'm working with the information I have in my personal notes, therefore I might also need some review from your side as well to make sure the information available here is still accurate.

Thanks!

[TonaTM]

Wonderful documentation, it will be very useful for many players! Congratulations!