Make chatGPT version configurable

[malixsys]

This parameter should be configurable:

https://github.com/embedchain/embedchainjs/blob/91706329bc0baba7d6af5421c037a668b0b0a8b6/embedchain/embedchain.ts#L146

[cachho]

Hey, this is a version discrepancy between TS and PY. We have been focusing on python lately, brought out many refactors and new features. I hope that next week I can bring them to TS. Sorry for the inconvenience and wait.

[jonasiwnl]

pr opened #29