feat(core): Add EInvoiceCreator class for generating ZUGFeRD/Factur-X XML

ts/plugins.ts

@@ -7,9 +7,11 @@ export {
 
 // @push.rocks scope
 import * as smartfile from '@push.rocks/smartfile';
+import * as smartxml from '@push.rocks/smartxml';
 
 export {
-  smartfile
+  smartfile,
+  smartxml
 }
 
 // third party
@@ -17,4 +19,11 @@ import * as pdfLib from 'pdf-lib';
 
 export {
   pdfLib
-}
+}
+
+// tsclass scope
+import * as tsclass from '@tsclass/tsclass';
+
+export {
+  tsclass
+}