forked from loafle/openapi-generator-original
* [cli] Write to stdout/stderr, allow redirection Previously, slf4j-simple from generator core was being used. This writes to only a single stream (STDERR) and is confusing from a CLI tooling perspective. This consumes logback in CLI, and excludes core's slf4j-simple dependency. This allows us to define multiple appenders, one for STDOUT and one for STDERR. WARN messages and lower are written to STDOUT. ERROR is written to STDERR. * [cli] Limit logs to match prev implementation * Remove slf4j-simple from core project, to avoid conflicts with consumer logger implementations