split property & values into separate classes and files

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

include/ikarus/objects/properties/number_property.h

@@ -0,0 +1,25 @@
+#pragma once
+
+/// \file number_property.h
+/// \author Folling <folling@ikarus.world>
+
+#include <ikarus/macros.h>
+
+/// \addtogroup properties Properties
+/// \brief Number properties store a numeric value. (e.g. "Weight" or "Age")
+/// @{
+
+IKARUS_BEGIN_HEADER
+
+struct IkarusNumberProperty;
+
+IKA_API IkarusNumberProperty * ikarus_number_property_create(
+    struct IkarusProject * project,
+    char const * name,
+    struct IkarusPropertySource * property_source,
+    struct IkarusNumberSettings * settings
+);
+
+IKARUS_END_HEADER
+
+/// @}