NSFS | NC | CLI | CLI commands responses & errors refactor, --show_secrets and lstat linux fix

[romayalon]

Explain the changes

This PR suggests changing all cli responses / errors written to stdout to be of json format. notice that help will be printed only by help command, and no longer be available after printing errors.
create/update/status commands will result a json containing Status of the manipulated entity.
list command will result a json containing List of the listed entities.:

Example 1:
  "response": {
    "code": "AccountCreated",
    "reply": {
      "name": "account2",
      "email": "account2@noobaa.io",
      "creation_date": "2023-12-11T15:07:31.886Z",
      "access_keys": [
        {
          "access_key": "bcd",
          "secret_key": "234"
        }
      ],
      "nsfs_account_config": {
        "uid": 222,
        "gid": 222,
        "new_buckets_path": "/private/tmp/test_bucketspace_fs/root_path_manage_nsfs/new_buckets_path_user2/"
      }
    }
  }

EXAMPLE 2: 
node src/cmd/manage_nsfs account add --name project1 --email project1@gmail.com --access_key pr1 --secret_key pr1 --new_buckets_path /root/project1-data --uid "1602" --gid "1996" 2> /dev/null
{
  "error": {
    "code": "InvalidAccountNewBucketsPath",
    "message": "Account's new_buckets_path should be a valid and existing directory path",
    "detail": "/root/project1-data"
  }
}

1. Added manage_nsfs_cli_errors.js and manage_nsfs_cli_responsed.js in order to have a well defined errors and responses of the manage cli commands.
2. manage_nsfs.js -
   2.1. added write_stdout_response() and throw_cli_error() functions in order to have a single place where we write to stdout.
   2.2. replaced all stdout.write() calls to call the new functions while specifying the new error/response type.
   2.3. some refactoring of is_undefined(value), the validation functions.
   2.4. added --show-secrets flag.

Issues: Fixed #xxx / Gap #xxx

Testing Instructions:

• Doc added/updated
• Tests added

[naveenpaul1]

LGTM