Add a command to open prompt editing in notepad or other text editor like Claude Code has

[frastlin]

Describe the feature or problem you'd like to solve

Currently, it is empossible to edit prompts in Copilot CLI with a screen reader. The way the interface is built blocks screen readers from accessing text.

Proposed solution

I would like a way to open the current prompt in a text editor like notepad so I can modify my prompt and paste long prompts without worrying about making one small typo. In Claude code, this is a feature that is opened with ctrl+g.

Example prompts or workflows

Example 1:

Prompt:
"Edit my cide to say hello wkorld"
Currently:
I need to delete everything and type my prompt over again.
With this feature:
I press ctrl+g, and this prompt opens in notepad. I can edit the prompt to say:
"Edit my code to say hello world"
I save, then press alt+f4, then press enter on the CLI interface. This sends my prompt to copilot.

Example 2:
I have a multiple line prompt, for example:

Code the following in python:
Hello
world

Currently:
If I press enter, it sends the command to copilot. Of course I can enable the multi line editing, but that is annoying.
With this feature:
I just write the multi line command, save, close notepad and press enter.

Example 3:
I am stuck on how to spell a word.
Currently, I need to open another window with spellcheck, type the word, right-click to open spelling, then select the correct response, select all, then alt+tab to the cli window and paste the word in the correct location.
With this feature:
I just press ctrl+g, type my misspelled word, right-click, select the correct word, save, close the window, and press enter.

Additional context

No response