implement toggle/number/text values

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

src/values/number_value.cpp

@@ -0,0 +1,26 @@
+#include "ikarus/values/number_value.h"
+
+#include <values/number_value.hpp>
+
+IkarusNumberValue * ikarus_number_value_create(long double value) {
+    return new IkarusNumberValue{value};
+}
+
+IkarusNumberValue * ikarus_number_value_create_indeterminate() {
+    auto * ret = new IkarusNumberValue{0.0};
+    ret->set_intermediate(true);
+
+    return ret;
+}
+
+long double ikarus_number_value_get(IkarusNumberValue const * value) {
+    return value->get_value();
+}
+
+void ikarus_number_value_set(IkarusNumberValue * value, long double new_value) {
+    value->set_value(new_value);
+}
+
+struct IkarusValue * ikarus_number_value_to_value(IkarusNumberValue * number_value) {
+    return static_cast<IkarusValue *>(number_value);
+}