Allow interrupt current execution with new prompt by tapping enter twice

### Describe the feature or problem you'd like to solve

Allow quick redirection of AI by double tapping enter to force the new prompt for immediate execution

### Proposed solution

Grok CLI has a very nice funcionality that allow prompts to be sent immediately to the AI skipping the queue if you double tab the enter (after submiting the porompt).

This seems to be a very useful feature to bring to copilot CLI

### Example prompts or workflows

_No response_

### Additional context

_No response_

首先定位 CLI 的提示输入处理、提交流程以及执行队列或中断逻辑。确认提交后如何检测第二次 Enter，然后验证它会立即中断当前执行并运行新的提示，而不是在队列中等待。

由索引模型根据 Issue 内容生成。