* move table schema merging into helper * update helper name, add evented value to table configuration * update indentation * update error messages for readability * typo * update helper name, exits and description * Add missing columns to osquery_tables.json * add merge schema script * rename script to `generate-merged-schema` * Update generate-merged-schema.js * Add error messages * update error messages Co-authored-by: Mike McNeil <mikermcneil@users.noreply.github.com>