update sqlitecpp & merge property settings into properties

Signed-off-by: Folling <mail@folling.io>

include/ikarus/objects/object.h

@@ -8,12 +8,9 @@
 /// \defgroup object Objects
 /// \brief Objects are a compound type of all types of objects in the database.
 /// \details The following objects currently exist:
-/// - blueprints
-/// - properties
-/// - entities
-/// - blueprint folders
-/// - property folders
-/// - entity folders
+/// - \ref blueprint.h "Blueprints"
+/// - \ref property.h "Properties"
+/// - \ref entity.h "Entities"
 /// @{
 
 IKARUS_BEGIN_HEADER
@@ -21,6 +18,16 @@ IKARUS_BEGIN_HEADER
 /// \brief A generic object. Wraps all types of objects, including folders.
 struct IkarusObject;
 
+/// \brief Compares two objects for equality.
+/// \details This neither compares the pointers nor does a deep copy. Instead it figures out if the objects _are_ the same
+/// object.
+/// \param lhs The left hand side object.
+/// \pre \li Must not be null.
+/// \param rhs The right hand side object.
+/// \pre \li Must not be null.
+/// \return True if the objects are equal, false otherwise.
+IKA_API bool ikarus_object_is_equal(IkarusObject const * lhs, IkarusObject const * rhs);
+
 /// \brief Visits an object. Calling the appropriate function for the object's type.
 /// \param object The object to visit.
 /// \param blueprint_visitor The function to call if the object is a blueprint. Skipped if null.
@@ -55,4 +62,4 @@ IKA_API void ikarus_object_visit_const(
 
 IKARUS_END_HEADER
 
-// @}
+/// @}