I apologize, but it seems that the README file is not available. However, I can still create a passage about the plugin based on my understanding.

The Archive/Trash to Single Note plugin is designed to simplify your Obsidian workflow by providing an easy way to convert archived or trashed notes into single notes. This feature can be particularly useful for users who frequently move notes around their knowledge base and want to streamline their organization process. With this plugin, you'll be able to quickly transform multiple notes into a single, easily accessible note, making it easier to focus on the information that matters most.

Allows to create single file archive/trash and merge(archive) old notes with it.