message: fix: reword help text
diff: },
  {
  "flags": ["-T", "--output-tree"],
  - "desc": "Path to output Auspice JSON V2 results file. If the three is not needed, omitting this flag reduces processing time and memory consumption. For file format description see: https://nextstrain.org/docs/bioinformatics/data-formats",
  + "desc": "Path to output Auspice JSON V2 results file. If the tree is not needed, omitting this flag reduces processing time and memory consumption. For file format description see: https://nextstrain.org/docs/bioinformatics/data-formats",
  "cppName": "outputTree",
  "cppType": "std::string",
  "isOptional": true
  },
  {
  "flags": ["-d", "--output-dir"],
  - "desc": "Write output files to this directory. The base filename can be set using `--output-basename` flag. The paths can be overridden on a per-file basis using `--output-*` flags. If the required directory tree does not exist, it will be created.",
  + "desc": "Write output alignment and peptide files to this directory. The base filename can be set using `--output-basename` flag. The paths can be overridden on a per-file basis using `--output-*` flags. If the required directory tree does not exist, it will be created.",
  "cppName": "outputDir",
  "cppType": "std::string",
  "isOptional": true
  },
  {
  "flags": ["-n", "--output-basename"],
  - "desc": "Set the base filename to use for output files. To be used together with `--output-dir` flag. By default uses the filename of the sequences file (provided with `--sequences`). The paths can be overridden on a per-file basis using `--output-*` flags.",
  + "desc": "Set the base filename to use for output alignment and peptide files. To be used together with `--output-dir` flag. By default uses the filename of the sequences file (provided with `--sequences`). The paths can be overridden on a per-file basis using `--output-*` flags.",
  "cppName": "outputBasename",
  "cppType": "std::string",
  "isOptional": true
  },
  {
  "name": "dataset",
  - "desc": "Operations on datasets.",
  + "desc": "Operations on datasets: view and download available datasets, which can be used with `run` command.",
  "requireSubcommand": 1,
  "cppStructName": null,
  "callbackName": null,
  