Moving the config file for Tunnelbroker to the `~/.config` directory to unify services configuration. Removing using the "sandbox" config file. Updating services documentation about the new path and removing the sandbox config.
Linear task and full context: [[ https://linear.app/comm/issue/ENG-1680/change-config-file-directory-to-dollarhomeconfigtunnelbrokerini-and | ENG-1680 ]]