* 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
* Wallet import: Surface detailed error messages
Similar to #4205, this checks if the input is an output descriptor and display more detailed information about why an import might fail.
* Add test cases
Checks if the input is an output descriptor and explicitely handles that case instead of catching any errors. This allows us to display more detailed information about why an import might fail.
