Add coding guidelines enforcement (#85)

* Add initial coding guidelines and fix where necessary

* Enforce code styling and update code where necessary

* Remove duplicate .editorconfig entries

* Add code analysis setup to CI

* Add missing checkout step

* Update incorrect action version tag

* Remove incompatible analysis step

* Push code style offense to validate CI pipeline

* Remove code style violation

* Add global.json

Epsilon.Canvas/Service/FileHttpService.cs

@@ -1,4 +1,4 @@
-using Epsilon.Canvas.Abstractions.Service;
+using Epsilon.Canvas.Abstractions.Service;
 using Epsilon.Canvas.Http;
 
 namespace Epsilon.Canvas.Service;