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/FILESTUB.cpp

@@ -0,0 +1,80 @@
+#include "munga.h"
+#pragma hdrstop
+
+#include "filestrm.h"
+#include <fcntl.h>
+#include <io.h>
+#include <sys\stat.h>
+
+//#############################################################################
+//###########################    FileStream    ################################
+//#############################################################################
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+int
+	FileStream::OpenImplementation(
+		const char *file_name,
+		Logical read_only
+	)
+{
+	if (read_only)
+	{
+		return _open(file_name, _O_BINARY | _O_RDONLY);
+	}
+	else
+	{
+		return _open(file_name, _O_BINARY | _O_CREAT | _O_TRUNC | _O_WRONLY, _S_IWRITE);
+	}
+}
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+void FileStream::FlushImplementation(int file_handle)
+{
+	_commit(file_handle);
+}
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+void FileStream::CloseImplementation(int file_handle)
+{
+	_close(file_handle);
+}
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+size_t
+	FileStream::SeekImplementation(
+		int file_handle,
+		size_t where,
+		Logical from_end
+	)
+{
+	return _lseek(file_handle, (long)where, (from_end) ? SEEK_END : SEEK_SET);
+}
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+size_t
+	FileStream::ReadImplementation(
+		int file_handle,
+		void *buffer,
+		size_t length
+	)
+{
+	return _read(file_handle, buffer, length);
+}
+
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+size_t
+	FileStream::WriteImplementation(
+		int file_handle,
+		const void *buffer,
+		size_t length
+	)
+{
+	return _write(file_handle, buffer, length);
+}
+