* [OPIK-536]: fix merge conflicts;
* [OPIK-536]: playground ui improvements;
* [OPIK-536]: fix the comments from the product [2];
* [OPIK-536]: update the color of a placeholder in select;
* [OPIK-536]: update the color of a placeholder in select;
* [OPIK-536]: update the openai api key;
* [OPIK-536]: finish the functionality of playground;
* [OPIK-536]: eslint fixes;
* [OPIK-536]: eslint fixes;
* [OPIK-536]: update package-lock.json;
* [OPIK-536]: merge problems fixes;
* [OPIK-536]: fix a type;
* [OPIK-536]: remove an old file and comments;
* [OPIK-536]: improve code readability;
* [OPIK-536]: add more models;
* [OPIK-536]: remove a useless comment;
* [OPIK-536]: hide playground if not ready for users;
* [OPIK-536]: remove a buggy tooltip;
* [OPIK-536]: fix the min width;
* [OPIK-536]: support tracing for stop button;
* [OPIK-536]: improve code readability;
* [OPIK-536]: pr comment fixes;
* [OPIK-536]: remove use memo;
* [OPIK-536]: fix the package lock json;
---------
Co-authored-by: Sasha <aliaksandr@comet.com>
