Official Clojure-Brainflow Downloader

Instead of hardcoding a user-specific local path directly into deps.edn, this version generates a separate brainflow-local.edn file in the root of the project that contains the local dependency path. The brainflow-local.edn file is added to .gitignore to keep user-specific information private and out of version control. The main deps.edn references this file via the :flow alias using :deps-file, allowing each user to maintain their own local configuration without causing path conflicts or exposing sensitive details.