add customization for filedetails

Author: grhuangmsft

src/Support/Support.Autorest/README.md

@@ -75,6 +75,18 @@ directive:
           - Name
           - ResourceType # Do we need this? 
           # - Type
+  - where:
+      model-name: FileDetails
+    set:
+      format-table:
+        properties:
+          # - Id
+          - Name
+          - CreatedOn
+          - ChunkSize
+          - FileSize
+          - NumberOfChunks 
+          # - Type
   # Following are common directives which are normally required in all the RPs
   # 1. Remove the unexpanded parameter set
   # 2. For New-* cmdlets, ViaIdentity is not required