Programmatically download icons?

For the case you are interested:
For fonts, which are far smaller files, I used this way to do it:
```
ZnClient new
			url: aUrl;
			numberOfRetries: 5;
			timeout: 100;
			logToTranscript;
			downloadTo: downloadDirectory.
```
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https://github.com/pharo-graphics/Alexandrie/blob/3e4bf24b9b26337bddd0f1fb53671cda58825b05/src/Alexandrie-FreeType-Tests/AeDownloadedFont.class.st#L35
