Initial import of Red Planet v4.10 Win32 source

Imports the current Win32 source for the pod-racing game 'Red Planet',
built on the MUNGA engine and its L4 (Win32/DirectX) platform layer:

- MUNGA / MUNGA_L4: cross-platform engine core and Win32 backend
- RP / RP_L4: Red Planet game logic and Win32 application
- DivLoader, Setup1: asset loader and installer project
- lib, MUNGA_L4/openal, MUNGA_L4/sos: third-party audio dependencies

Removed stale Subversion metadata and added .gitignore/.gitattributes.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

MUNGA/NODE.cpp

@@ -0,0 +1,22 @@
+#include "munga.h"
+#pragma hdrstop
+
+#include "node.h"
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Node ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Node::Node(ClassID class_id) : Plug(class_id)
+{
+}
+
+Node::Node(PlugStream *stream) : Plug(stream)
+{
+}
+
+Node::~Node()
+{
+}
+
+void Node::ReleaseLinkHandler(Socket*, Plug*)
+{
+}