Add and apply .editorconfig from P2 (#1195)

* Consistenty use javax annotations.
 - Unfortunately jetbrains annotations seem to be exposed transitively via core somewhere, but with the correct IDE settings, annotations can be defaulted to javax
 - Cleaning up of import order in #1195
 - Must be merged before #1195

* Add and apply .editorconfig from P2
 - Does not rearrange entries

* Address some comments

* add back some javadoc comments

* Address final comments

Co-authored-by: NotMyFault <mc.cache@web.de>

worldedit-core/src/main/java/com/sk89q/worldedit/TracedEditSession.java

@@ -45,4 +45,5 @@ class TracedEditSession extends EditSession {
             WorldEdit.logger.warn("Here is a stacktrace from the creation of this EditSession:", stacktrace);
         }
     }
+
 }