Neovim: remove compiled command-server from mono repo

[saidelike]

Atm we have cursorless.nvim/node/command-server/out/index.cjs compiled JS into the mono repo since we need to package it when deploying it into cursorless.nvim. This is a limitation of current node-client (neovim npm package) which will be fixed in the future.

When it is the case, we can get rid of the compiled command-server from cursorless mono repo.