feat: integrate with flysystem for xml data

config/packages/flysystem.yaml

@@ -0,0 +1,20 @@
+flysystem:
+    storages:
+        default.storage:
+            adapter: 'local'
+            options:
+                directory: '%kernel.project_dir%/var/storage/default'
+        xml_export.storage:
+            adapter: 'local'
+            options:
+                directory: '%kernel.project_dir%/var/xmlexport'
+        xml_dump.storage:
+            adapter: 'local'
+            options:
+                directory: '%kernel.project_dir%/var/bpn'
+#            adapter: 'sftp'
+#            options:
+#                host: '%env(SFTP_XML_EXPORT_HOST)%'
+#                port: '%env(int:SFTP_XML_EXPORT_PORT)%'
+#                username: '%env(SFTP_XML_EXPORT_USER)%'
+#                password: '%env(SFTP_XML_EXPORT_PASSWORD)%'