Initial commit: ROW Client source code

Game client codebase including:
- CharacterActionControl: Character and creature management
- GlobalScript: Network, items, skills, quests, utilities
- RYLClient: Main client application with GUI and event handlers
- Engine: 3D rendering engine (RYLGL)
- MemoryManager: Custom memory allocation
- Library: Third-party dependencies (DirectX, boost, etc.)
- Tools: Development utilities

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Engine/Zalla3D Base Class/Boost/pool/detail/singleton.hpp

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+// Copyright (C) 2000 Stephen Cleary
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+// See http://www.boost.org for updates, documentation, and revision history.
+
+#ifndef BOOST_POOL_SINGLETON_HPP
+#define BOOST_POOL_SINGLETON_HPP
+
+// The following code might be put into some Boost.Config header in a later revision
+#ifdef __BORLANDC__
+# pragma option push -w-inl
+#endif
+
+//
+// The following helper classes are placeholders for a generic "singleton"
+//  class.  The classes below support usage of singletons, including use in
+//  program startup/shutdown code, AS LONG AS there is only one thread
+//  running before main() begins, and only one thread running after main()
+//  exits.
+//
+// This class is also limited in that it can only provide singleton usage for
+//  classes with default constructors.
+//
+
+// The design of this class is somewhat twisted, but can be followed by the
+//  calling inheritance.  Let us assume that there is some user code that
+//  calls "singleton_default<T>::instance()".  The following (convoluted)
+//  sequence ensures that the same function will be called before main():
+//    instance() contains a call to create_object.do_nothing()
+//    Thus, object_creator is implicitly instantiated, and create_object
+//      must exist.
+//    Since create_object is a static member, its constructor must be
+//      called before main().
+//    The constructor contains a call to instance(), thus ensuring that
+//      instance() will be called before main().
+//    The first time instance() is called (i.e., before main()) is the
+//      latest point in program execution where the object of type T
+//      can be created.
+//    Thus, any call to instance() will auto-magically result in a call to
+//      instance() before main(), unless already present.
+//  Furthermore, since the instance() function contains the object, instead
+//  of the singleton_default class containing a static instance of the
+//  object, that object is guaranteed to be constructed (at the latest) in
+//  the first call to instance().  This permits calls to instance() from
+//  static code, even if that code is called before the file-scope objects
+//  in this file have been initialized.
+
+namespace boost {
+
+namespace details {
+namespace pool {
+
+// T must be: no-throw default constructible and no-throw destructible
+template <typename T>
+struct singleton_default
+{
+  private:
+    struct object_creator
+    {
+      // This constructor does nothing more than ensure that instance()
+      //  is called before main() begins, thus creating the static
+      //  T object before multithreading race issues can come up.
+      object_creator() { singleton_default<T>::instance(); }
+      inline void do_nothing() const { }
+    };
+    static object_creator create_object;
+
+    singleton_default();
+
+  public:
+    typedef T object_type;
+
+    // If, at any point (in user code), singleton_default<T>::instance()
+    //  is called, then the following function is instantiated.
+    static object_type & instance()
+    {
+      // This is the object that we return a reference to.
+      // It is guaranteed to be created before main() begins because of
+      //  the next line.
+      static object_type obj;
+
+      // The following line does nothing else than force the instantiation
+      //  of singleton_default<T>::create_object, whose constructor is
+      //  called before main() begins.
+      create_object.do_nothing();
+
+      return obj;
+    }
+};
+template <typename T>
+typename singleton_default<T>::object_creator
+singleton_default<T>::create_object;
+
+} // namespace pool
+} // namespace details
+
+} // namespace boost
+
+// The following code might be put into some Boost.Config header in a later revision
+#ifdef __BORLANDC__
+# pragma option pop
+#endif
+
+#endif