message: CR: Add enum for razor.languageServer.trace option
diff: },
  "razor.languageServer.trace": {
  "type": "string",
  - "default": "Messages",
  + "default": "Off",
  + "enum": [
  + "Off",
  + "Messages",
  + "Verbose"
  + ],
  + "enumDescriptions": [
  + "Does not log messages from Razor Language Server",
  + "Logs only some messages from Razor Language Server",
  + "Logs all messages from Razor Language Server"
  + ],
  "description": "Specifies whether to output all messages [Verbose], some messages [Messages] or not at all [Off]."
  }
  }
  