PEFT integration/example

[gokceuludogan]

Given the model size being 1.1B parameters, I believe PEFT integration into the library would be beneficial, or at least having an example with our datasets and evaluators.

[meliksahturker]

I have prepared a sample notebook that contains fine-tuning + inference for the paraphrasing task. However the fine-tuned model re-produces the input most of the time so I am debugging that right now.
Will push when we have an end-to-end notebook with fine-tuning, saving, loading and inference.
@gokceuludogan fyi.