Add new sweep-bench benchmark (#225)

* examples : add new sweep-bench benchmark

* Change documentation to reference ik_llama.cpp

* Made it compile with ik_llama

* Fix JSONL output

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Co-authored-by: Stanisław Szymczyk <sszymczy@gmail.com>

common/common.h

@@ -269,6 +269,8 @@ struct gpt_params {
     bool spm_infill = false; // suffix/prefix/middle pattern for infill
 
     std::string lora_outfile = "ggml-lora-merged-f16.gguf";
+
+    bool sweep_bench_output_jsonl = false;
 };
 
 void gpt_params_handle_hf_token(gpt_params & params);