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/MODE.cpp

@@ -0,0 +1,59 @@
+#include "munga.h"
+#pragma hdrstop
+
+#include "mode.h"
+
+#if defined(DEBUG)
+#	define Test_Tell(n) DEBUG_STREAM << n
+#else
+#	define Test_Tell(n)
+#endif
+
+//############################################################################
+//############################    ModeManager    #############################
+//############################################################################
+ModeManager::ModeManager(ModeMask initial_mask)
+{
+	Check_Pointer(this);
+
+	modeMask = initial_mask;
+
+	Check_Fpu();
+}
+
+ModeManager::~ModeManager()
+{
+	Check(this);
+	Check_Fpu();
+}
+
+Logical
+	ModeManager::TestInstance() const
+{
+	Check_Fpu();
+	return True;
+}
+
+Logical
+	ModeManager::ModeStringLookup(
+		const char *name,
+		ModeMask *returned_value
+	)
+{
+	Check(this);
+
+	// There's only one mode value available at this level.
+
+	if (stricmp(name, "ModeAlwaysActive") == 0)
+	{
+		*returned_value = ModeManager::ModeAlwaysActive;
+		Check_Fpu();
+		return True;
+	}
+	else
+	{
+		*returned_value = (ModeMask) 0;
+	}
+	Check_Fpu();
+	return False;
+}