[FEATURE] File Refresh

## Feature Description

Is there a file refresh system [like in the other claude code neovim plugin?](https://github.com/greggh/claude-code.nvim/blob/main/lua/claude-code/file_refresh.lua) I searched through the issues but I couldn't find any complaints about it. It's not a big deal to type `:ea` after going back to an editing buffer after claude makes some edits, but it would be nice if this happened automatically (and I would prefer if it was dependent on claude code making a change and not a global neovim file refresh setting that was always running).

## Use Case

This is just a small convenience which keeps the buffers that claude code is changing live updating.

## Proposed Solution

If this is already possible somewhere, please let me know. Otherwise I can try to port the solution from the other project and make a PR.

## Alternatives Considered

typing `:ea` reloads all buffers from the files on disk

## Additional Context

N/A

Lies zunächst lua/claude-code/file_refresh.lua in der referenzierten claude-code.nvim-Implementierung und untersuche den Editierablauf dieses Plugins für Claude Code. Als abgeschlossen gilt die Aufgabe, wenn von Claude Code geänderte Buffer beim erneuten Aufrufen automatisch aktualisiert werden, ohne eine globale Neovim-Aktualisierungseinstellung zu aktivieren; überprüfe das Verhalten anhand des bestehenden :ea-Alternativbefehls.

Vom Indexierungsmodell aus dem Issue-Text verfasst.