Store the data from each plugin in it's own folder

CURA-6627

plugins/3MFWriter/ThreeMFWorkspaceWriter.py

@@ -81,13 +81,15 @@ class ThreeMFWorkspaceWriter(WorkspaceWriter):
         return True
 
     def _writePluginMetadataToArchive(self, archive):
-        file_name = "Cura/plugin_metadata.json"
-
-        file_in_archive = zipfile.ZipInfo(file_name)
-        # For some reason we have to set the compress type of each file as well (it doesn't keep the type of the entire archive)
-        file_in_archive.compress_type = zipfile.ZIP_DEFLATED
-        import json
-        archive.writestr(file_in_archive, json.dumps(Application.getInstance()._workspace_metadata_storage.getAllData()))
+        file_name_template = "%s/plugin_metadata.json"
+
+        for plugin_id, metadata in Application.getInstance()._workspace_metadata_storage.getAllData().items():
+            file_name = file_name_template % plugin_id
+            file_in_archive = zipfile.ZipInfo(file_name)
+            # We have to set the compress type of each file as well (it doesn't keep the type of the entire archive)
+            file_in_archive.compress_type = zipfile.ZIP_DEFLATED
+            import json
+            archive.writestr(file_in_archive, json.dumps(metadata, separators = (", ", ": "), indent = 4))
 
     ##  Helper function that writes ContainerStacks, InstanceContainers and DefinitionContainers to the archive.
     #   \param container That follows the \type{ContainerInterface} to archive.