[Feature Request] Autocompletion for devcontainer cli commands

It would be helpful if the commands in the terminal will autocomplete.

I would like to see this feature added.

For example:

`devcontainer feature test --skip-s`

when hitting tab it should autocomplete to `--skip-scenarios`

从 devcontainer CLI 命令定义入手，跟踪 `devcontainer feature test` 如何提供 `--skip-scenarios` 选项。确定 shell 补全在哪里配置或生成，然后验证输入 `devcontainer feature test --skip-s` 并按 Tab 后会补全为 `--skip-scenarios`，且对其他 CLI 命令也有效。

由索引模型根据 Issue 内容生成。