Adding the server and client code to the JSON language features extensions to enable JSONC sorting in VS Code (#174352)

* temporarily changing the funcion onFromat to be able to trigger the sorting on real examples

* adding the DocumentSortingRequest

* accesssing directly the text edits from the request

* added code in order to provide the link between the json sorting capabiliites and vscode

* adapting to the new api output of the sort function

* instead of using await use then inside of the command that registers

* textEditor replaces window.activeTextEditor

* adding changes from review

* update service

* use SortOptions

---------

Co-authored-by: Martin Aeschlimann <martinae@microsoft.com>

extensions/json-language-features/package.json

@@ -149,6 +149,11 @@
         "command": "json.clearCache",
         "title": "%json.command.clearCache%",
         "category": "JSON"
+      },
+      {
+        "command": "json.sort",
+        "title": "%json.command.sort%",
+        "category": "JSON"
       }
     ]
   },