[FEATURE] Send an opening file from buffer to claudecode

## Feature Description

I want a feature that allow to send an opening file directly from buffer to claudecode.
Now I'm using oil.nvim but I need to open oil and then send file to claudecode but it is redundant. I just want to send an opening file itself from a buffer.

## Proposed Solution

I have no idea, sorry.

## Alternatives Considered

No.
