How to edit a text file in a zip or rar archive, without manual extract/compression?
You can't just "edit" an entry in-place in a RAR/ZIP file because it's compressed.

You'll need to decompress it, edit the files as needed, and then re-compress it.

WinRAR (Windows) do this steps automatically. Up to now, I couldn't find an application do like WinRAR (Windows) on Android OS.