TradeParty Name should be optional for ShipToTradeParty

[ivantomic77]

Issue: TradeParty Name Should Be Optional for ShipToTradeParty

Description

I am generating an XRechnung invoice using ZUGFeRD2PullProvider. The delivery information includes an optional field, Deliver to party name (BT-70), which, according to the specification, is not mandatory. However, the current implementation does not handle null values for this field, leading to potential issues.

The issue arises because the same function is used for creating a TradeParty, and this function does not allow the name field to be optional.

ZUGFeRD2PullProvider.java - Lines 635-649

if (this.trans.getDeliveryAddress() != null) {
	xml += "<ram:ShipToTradeParty>" +
		getTradePartyAsXML(this.trans.getDeliveryAddress(), false, true) +
		"</ram:ShipToTradeParty>";
}

ZUGFeRD2PullProvider.java - Line 142

xml += "<ram:Name>" + XMLTools.encodeXML(party.getName()) + "</ram:Name>";

Suggested fix:

if (party.getName() != null && !party.getName().isEmpty()) {
    xml += "<ram:Name>" + XMLTools.encodeXML(party.getName()) + "</ram:Name>";
}

Thank you in advance!