Feature Request: Handling of GS1-128 and GS1 DataMatrix

[jtommi]

Some medicines now only have GS1 Datamatrix barcodes, but they are more complex than a simple barcode and they need to be parsed.
Here are examples of those barcodes: Image

Both contain the GTIN (the identifier we're interested in) as well as serial number and lot number (but they can also contain expiry date, product date, etc).

I'd love to help with this, but I don't know Java at all (pretty good in Python, so I know my way around code, kind of).

I think this should be a pretty low priority feature. You don't buy medicines that often, so they can be added manually to Grocy instead of scanning them.