Fix some includes in source/graphics

Make include-what-you-use happy with some files in source/graphics and
fix what needs to be fixed.

Ref: #8086
Signed-off-by: Ralph Sennhauser <ralph.sennhauser@gmail.com>

source/graphics/ModelAbstract.cpp

@@ -1,4 +1,4 @@
-/* Copyright (C) 2011 Wildfire Games.
+/* Copyright (C) 2025 Wildfire Games.
  * This file is part of 0 A.D.
  *
  * 0 A.D. is free software: you can redistribute it and/or modify
@@ -19,8 +19,12 @@
 
 #include "ModelAbstract.h"
 
+#include "lib/debug.h"
+#include "maths/Vector3D.h"
 #include "ps/CLogger.h"
 
+#include <algorithm>
+
 const CBoundingBoxOriented& CModelAbstract::GetSelectionBox()
 {
 	if (!m_SelectionBoxValid)