Add documentation for selecting code

[nikero41]

It would be nice to have in the documentation how you can have as a selection a highlighted code section or the whole buffer by default.

I can't understand when it selects the whole buffer or just one line.

I think I can should use the selection field but it would be nice to be in the readme as well.

[deathbeam]

It is in README in the default configuration section here:

Also in MIGRATION guide:
https://github.com/CopilotC-Nvim/CopilotChat.nvim/blob/canary/MIGRATION.md

And also in API section:

Not sure if having it mentioned 4th time is super necessary, is it rly that confusing?

[jellydn]

Hi @snikoletopoulos Is that clear for you now or any comments/questions on how it works?

[nikero41]

Sorry for my late response.
It is clear yes.
When I try to open the chat with '<,'>CopilotChatOpen in a selected range it errors E481: No range allowed
Is this expected?

I've noticed if i remove the range it still selects the text

It would be nice if it supported ranges as well