Add Dataset Generation Notebook

## Description
Create a Jupyter notebook for generating the dataset required for fine-tuning the CompanionLLama model. The dataset should be carefully curated, incorporating elements from the original Samantha dataset and additional contextual data to enhance the model's ability to emulate sentience.

## Tasks
- [ ] Develop a Jupyter notebook for dataset preparation.
- [ ] Ensure the notebook includes instructions for generating the dataset with different approaches.
- [ ] Document the steps and processes involved in dataset preparation.
- [ ] Test the dataset generation notebook to verify its functionality.
- [ ] Update the README to provide a link to the newly created notebook.