* 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
* Plugins: Add authorization hook
Makes the `PolicyRequirement` available to plugins.
Adds a filter hook to the authorization handlers, so that plugins can extend and leverage the existing authorization policies and permissions.
* Update to pass back and forth handle class
