Add paletteLabel to file nodes to make read/write more obvious

packages/node_modules/@node-red/nodes/locales/en-US/messages.json

@@ -853,6 +853,8 @@
     },
     "file": {
         "label": {
+            "write": "write file",
+            "read": "read file",
             "filename": "Filename",
             "action": "Action",
             "addnewline": "Add newline (\\n) to each payload?",
@@ -860,7 +862,6 @@
             "outputas": "Output",
             "breakchunks": "Break into chunks",
             "breaklines": "Break into lines",
-            "filelabel": "file",
             "sendError": "Send message on error (legacy mode)",
             "encoding": "Encoding",
             "deletelabel": "delete __file__",