Add setting option to disable the scrollbar

Describe the feature or problem you'd like to solve

The scrollbar on the right side is copied together with the content when copying with shift+selection and shift+right_click and copy.

Proposed solution

the scrollbar use '|' at the end of each line and '|' is copied together with the content. It's bothering to remove '|' everytime for the clean copied content.

Example prompts or workflows

No response

Additional context

No response

issue 中没有指定文件或测试。首先定位终端滚动条的渲染，以及 CLI 中通过 Shift 选择/右键单击进行复制的路径；追踪滚动条的 | 字符是如何进入复制内容的。完成标准是用户设置可以禁用滚动条，并且禁用后复制不再包含这些字符。