[Feature]: Integrate StoreBuddy with Epsilon Logistiki via XML document export

[PapLabros]

Describe the solution you'd like

This issue proposes an integration with Epsilon Logistiki by providing a mechanism to export all documents from the StoreBuddy application using a specific XML format that can be imported into the Epsilon Logistiki application used by accountants.

The system should support generating XML files that include all required accounting documents (such as invoices, receipts, refunds, and related entities) in a structure that is fully compatible with Epsilon Logistiki’s import requirements. The export process should ensure data integrity, correct mappings, and consistency with the accounting rules expected by the external system.

Alternatives you've considered

No response

Additional context

No response