chore: Move database storage containers to be translation unit local to allow for safe references (#1434)

* Move CDClientManager to be a namespace

Tested that worlds still load data as expected.  Had no use being a singleton anyways.

* Move cdclient data storage to tu local containers

Allows some data from these containers to be saved on object by reference instead of always needing to copy.

iteration 2

- move all unnamed namespace containers to a singular spot
- use macro for template specialization and variable declaration
- use templates to allow for as little copy paste of types and functions as possible

* remember to use typename!

compiler believes T::StorageType is accessing a member, not a type.

* Update CDClientManager.cpp

* move to cpp?

dDatabase/CDClientDatabase/CDClientManager.h

@@ -1,8 +1,5 @@
-#pragma once
-
-#include "CDTable.h"
-
-#include "Singleton.h"
+#ifndef __CDCLIENTMANAGER__H__
+#define __CDCLIENTMANAGER__H__
 
 #define UNUSED_TABLE(v)
 
@@ -20,7 +17,28 @@ namespace CDClientManager {
 	 * @return A pointer to the requested table.
 	 */
 	template<typename T>
-	T* GetTable() {
-		return &T::Instance();
-	}
+	T* GetTable();
+
+	/**
+	 * Fetch a table from CDClient
+	 * Note: Calling this function without a template specialization in CDClientManager.cpp will cause a linker error.
+	 * 
+	 * @tparam Table type to fetch
+	 * @return A pointer to the requested table.
+	 */
+	template<typename T>
+	typename T::StorageType& GetEntriesMutable();
 };
+
+
+// These are included after the CDClientManager namespace declaration as CDTable as of Jan 29 2024 relies on CDClientManager in Templated code.
+#include "CDTable.h"
+
+#include "Singleton.h"
+
+template<typename T>
+T* CDClientManager::GetTable() {
+	return &T::Instance();
+};
+
+#endif  //!__CDCLIENTMANAGER__H__