server : add "tokens" output (#10853) * server : add "tokens" output ggml-ci * server : update readme ggml-ci * server : return tokens ids only if requested ggml-ci * tests : improve "tokens" type check Co-authored-by: Xuan Son Nguyen <[email protected]> * server : remove "tokens" from the OAI endpoint ggml-ci --------- Co-authored-by: Xuan Son Nguyen <[email protected]>