feat(gui): add some saints row text extensions

Author: craftablescience

src/gui/previews/TextPreview.h

@@ -94,6 +94,7 @@ class TextPreview : public QWidget {
 		".set", // Titanfall & Apex Legends
 		".scr", ".dlg", ".lip", ".vfe", // Vampire: The Masquerade - Bloodlines
 		".tbl", // Red Faction
+		".vint_doc", ".vint_proj", // Saints Row 2
 	};
 
 	TextPreview(FileViewer* fileViewer_, Window* window_, QWidget* parent = nullptr);