make object fields public and fixup compile errors

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

src/objects/entity.cpp

@@ -0,0 +1,21 @@
+#include "entity.hpp"
+
+#include <cppbase/strings.hpp>
+
+#include <persistence/function_context.hpp>
+#include <persistence/project.hpp>
+
+IkarusEntity * ikarus_entity_create(struct IkarusProject * project, char const * name) {
+    LOG_INFO("creating new entity");
+
+    LOG_DEBUG("project={}; name={}", project->get_path().c_str(), name);
+
+    auto * ctx = project->get_function_context();
+
+    if (cppbase::is_empty_or_blank(name)) {
+        ctx->set_error("name is empty or blank", true, IkarusErrorInfo_Source_Client, IkarusErrorInfo_Type_Client_Input);
+        return nullptr;
+    }
+
+    // TODO
+}