Extract comparator core types into include/user/comparator.h.

Move Comparator and ComparatorExpression out of cologex.h so comparator
types can be shared by loadable comparator libraries without pulling in
the full cologex surface.

Co-authored-by: Cursor <cursoragent@cursor.com>

include/user/cologex.h

@@ -5,39 +5,12 @@
 #include <memory>
 #include <mentalEntity.h>
 #include <concept.h>
-#include <user/logic.h>
+#include <user/comparator.h>
 #include <user/stimulusFrame.h>
 
 namespace smo {
 namespace cologex {
 
-class Comparator
-:	public MentalEntity, public logic::Operand
-{
-public:
-	/**		EXPLANATION:
-	 * The reference for a Comparator is the fixed mentity or range of mentities
-	 * that this comparator is intended to validate a match against.
-	 *
-	 * There are several mentities against which a comparator can match. At the
-	 * time of writing, we're fairly sure that these will be at minimum,
-	 * qualia, chronomena and mentena.
-	 */
-	std::shared_ptr<MentalEntity> reference;
-};
-
-class ComparatorExpression
-:	public logic::UnaryExpression
-{
-public:
-	ComparatorExpression(
-		logic::Operator &op, std::shared_ptr<Comparator> &comparator
-	)
-	:	logic::UnaryExpression(
-			op, std::static_pointer_cast<logic::Operand>(comparator))
-	{}
-};
-
 class CombinatorialLogicExpression
 :	public MentalEntity, public logic::Expression, public Concept
 {