考虑改为单个 command 支持更多配置项，避免只能设置全局的 options

比如像 json-format 这种配置，可能每次执行命令时都要指定，并不是只能全局配置。

另外，像 `options json-format` ，这种配置是否应该更通用一点。 叫 `object-format` ? 可能值是 `json`, `plain` 。 类似http api结果。

Start by reviewing Arthas command option handling and the existing `options json-format` entry point. Determine how command-specific configuration should coexist with global options, and clarify whether the setting should be renamed to `object-format` with `json` and `plain` values. Done means the scope and command behavior are agreed and covered by relevant tests.

Written by the indexing model from the issue text.