Allow system robots to execute a large program in a single tick

[kostmo]

There should be a privileged variant of atomic that allows an arbitrarily large program to be executed in a single tick.
This would be useful for setting up a play area with randomness, for example in the word search challenge (#999). As is, the player robot needs to be confined and to wait patiently while the system robot does a bunch of work. Unless the system robot is programmed carefully, the solution might be revealed to an observant player as the playfield setup is performed.

[byorgey]

Ah, yes, that's a good idea, and it should be pretty easy. We could just do away with the validAtomic check for system robots, although in practice that is a little tricky since the validAtomic check is done statically, during type checking, but we won't know what capabilities the robot executing it will have until runtime. I guess we could just make a new super_atomic primitive (or whatever) that is just like atomic except that it requires god capability and does not do any validity checking.