feat(ZUGFERD): Add dedicated ZUGFERD v1/v2 support and refine invoice format detection logic

ts/index.ts

@@ -27,6 +27,12 @@ import { CIIBaseValidator } from './formats/cii/cii.validator.js';
 // Import PDF utilities
 import { PDFEmbedder } from './formats/pdf/pdf.embedder.js';
 import { PDFExtractor } from './formats/pdf/pdf.extractor.js';
+import {
+  BaseXMLExtractor,
+  StandardXMLExtractor,
+  AssociatedFilesExtractor,
+  TextXMLExtractor
+} from './formats/pdf/extractors/index.js';
 
 // Import format detector
 import { FormatDetector } from './formats/utils/format.detector.js';
@@ -36,6 +42,12 @@ import { FacturXDecoder } from './formats/cii/facturx/facturx.decoder.js';
 import { FacturXEncoder } from './formats/cii/facturx/facturx.encoder.js';
 import { FacturXValidator } from './formats/cii/facturx/facturx.validator.js';
 
+// Import ZUGFeRD implementation
+import { ZUGFeRDDecoder } from './formats/cii/zugferd/zugferd.decoder.js';
+import { ZUGFeRDEncoder } from './formats/cii/zugferd/zugferd.encoder.js';
+import { ZUGFeRDValidator } from './formats/cii/zugferd/zugferd.validator.js';
+import { ZUGFeRDV1Decoder } from './formats/cii/zugferd/zugferd.v1.decoder.js';
+
 // Export interfaces
 export type {
   // Common interfaces
@@ -46,12 +58,12 @@ export type {
   TLetterEnvelope,
   TDocumentEnvelope,
   IPdf,
-  
+
   // Validation interfaces
   ValidationError,
   ValidationResult,
   IValidator,
-  
+
   // Format interfaces
   ExportFormat,
   XInvoiceOptions
@@ -80,8 +92,18 @@ export { CIIBaseDecoder, CIIBaseEncoder, CIIBaseValidator };
 // Export Factur-X implementation
 export { FacturXDecoder, FacturXEncoder, FacturXValidator };
 
+// Export ZUGFeRD implementation
+export { ZUGFeRDDecoder, ZUGFeRDEncoder, ZUGFeRDValidator, ZUGFeRDV1Decoder };
+
 // Export PDF utilities
-export { PDFEmbedder, PDFExtractor };
+export {
+  PDFEmbedder,
+  PDFExtractor,
+  BaseXMLExtractor,
+  StandardXMLExtractor,
+  AssociatedFilesExtractor,
+  TextXMLExtractor
+};
 
 // Export format detector
 export { FormatDetector };
@@ -93,7 +115,7 @@ export { FormatDetector };
  * @returns ValidationResult with the result of validation
  */
 export function validateXml(
-  xml: string, 
+  xml: string,
   level: common.ValidationLevel = common.ValidationLevel.SYNTAX
 ): common.ValidationResult {
   try {