* Editorconfig: Add space_before_self_closing setting
This was a difference between the way dotnet-format and Rider format code. See https://www.jetbrains.com/help/rider/EditorConfig_Index.html
* Editorconfig: Keep 4 spaces indentation for Swagger JSON files
They are all formatted that way, let's keep it like that.
* Apply dotnet-format, mostly white-space related changes
* Greenfield: Proper response for store not found
Previously the "network not configured" error message was also displayed when indeed the store could not be found. This is misleading, hence we should have a separate error for that case.
* Use StoreNotFound method
