In general, you could break dependencies from the command on the editor module by injection or with cheap interfaces. So, command-table has two dependencies on editor: It uses Selection.findFrom, and it takes arguments of type ProseMirror. The former dependency can be turned into one similar to the latter by passing Selection.findFrom as first argument into moveCell. That way, you conceptionally use types from from editor, but have no dependencies on the JS code level.
To get rid of these logical dependencies, you could introduce a (smaller) interface wrapping the editor that schema, command and editor can depend on.
These are just some theoretical considerations, I’m not arguing that we should do this.