The REPL (which lives in Expression) was making use of the command options for the expression command. It's arguable whether REPL should even live in Expression to begin with, but it makes more sense for Command to depend on REPL than the other way around. The command library should be thought of as a UI library, low level engine stuff shouldn't depend on it, but the other way around makes perfect sense.
Anyway, only about 3-4 of the fields of this structure were even used and the rest were ignored, so we just give REPL its own custom structure and have the command object fill this out and pass it in. This way REPL doesn't need to reference one from a higher level library.
This breaks the cycle from Expression -> Commands -> Expression, reducing the distinct cycle count to 36.
Note that no CMakeLists.txt file needs to be updated here, because Expression was (incorrectly) not including Commands in its link list to begin with.