feat: add DumpOfferingIcons

src/dumper/dumper.cs

@@ -301,6 +301,22 @@ class Dumper
         WriteJson("offerings", _offeringMap.Values);
         _log.Info("Dumped {0} offerings", _offeringMap.Count);
     }
+
+    public void DumpOfferingIcons()
+    {
+        if (_provider == null)
+            throw new InvalidOperationException("Attempted to call dump function without dumper initialization/state");
+
+        _log.Info("Dumping offering icons");
+
+        foreach (OfferingInfo info in _offeringMap.Values)
+            ExportIcon(info.iconFilePath, "/offering-icons/");
+
+        _log.Info("Dumped all offering icons");
+
+        return;
+    }
+
     /*
      * internal helper functions
      */