ksys: Add KingEditor (stub)

src/KingSystem/System/CMakeLists.txt

@@ -1,6 +1,7 @@
 target_sources(uking PRIVATE
   Account.cpp
   Account.h
+  KingEditor.h
   OverlayArena.cpp
   OverlayArena.h
   OverlayArenaSystem.cpp

src/KingSystem/System/KingEditor.h

@@ -0,0 +1,21 @@
+#pragma once
+
+#include <heap/seadDisposer.h>
+
+namespace ksys {
+
+class KingEditorComponent {
+public:
+    virtual const char* getName() const = 0;
+    virtual void syncData() = 0;
+};
+
+// FIXME
+class KingEditor {
+    SEAD_SINGLETON_DISPOSER(KingEditor)
+
+public:
+    void registerComponent(KingEditorComponent* component);
+};
+
+}  // namespace ksys