Add the swagger files (#10878)

* Add Communication Services Specifications

* Remove Go code generation

Author: RezaJooyandeh

cSpell.json

@@ -729,5 +729,12 @@
                 "Fpushpins"
             ]
         }
+        ,
+        {
+            "filename": "**/specification/communication/data-plane/Microsoft.CommunicationServicesChat/preview/2020-09-21-preview2/communicationserviceschat.json",
+            "words": [
+                "readreceipts"
+            ]
+        }
     ]
 }