Openra: Add Documentation On How To Use Conditions

[KOYK]

We need an extensive tutorial on Conditions for average joes like me, in my case Conditions are really untouchable to the point of being useless for me.

As the wise man said:
Give a man a fish, and you feed him for a day. Teach a man to fish, and you feed him for a lifetime.

[MunWolf]

This should probably be possible now as the condition framework itself is pretty stable atm, the only big change coming to the condition system would be IntegerExpressions if they decide to add them.

[yaaaaa]

good idea

[GraionDilach]

IntegerExpressions are already included. PausableConditions is the next leap - framework is in, but most traits haven't been shifted to be pausable iirc.

Conditions are simple, okay, you do need a sense of binary logic to understand them though.

[MunWolf]

@GraionDilach Everything is simple when you understand it.
It is hard to learn when there is no documentation about a topic and you have to go digging to find the relevant information.
Sure programmers live and breathe with figuring stuff out but not everyone is a veteran programmer and even we tend to like our documentation ;)

[KOYK]

Closing this since @abcdefg30 made a guide on conditions here https://github.com/OpenRA/OpenRA/wiki/Conditions :+1: with minor fixes by @Mailaender