Move ov004 documentation from Ghidra

src/00_Core/Player/HealthManager.cpp

@@ -1,5 +0,0 @@
-#include "Player/HealthManager.hpp"
-
-void HealthManager::Save(SaveItemManager *save) {}
-void HealthManager::IncreaseMaxHealth(s16 amount) {}
-void HealthManager::UpdateShipMaxHealth() {}

src/00_Core/Player/PlayerManager.cpp

@@ -0,0 +1,5 @@
+#include "Player/PlayerManager.hpp"
+
+void PlayerManager::Save(SaveItemManager *save) {}
+void PlayerManager::IncreaseMaxHealth(s16 amount) {}
+void PlayerManager::UpdateShipMaxHealth() {}