Add DSCOVR notebook from 2022

Add notebook:
https://github.com/HarveySouth/spaceapps-2022/blob/b2cb88f84330d6b535f5452e093447759a629433/notebooks/data_preparation.ipynb
From 2022 challenge "Save the Earth from Another Carrington Event!":
https://2022.spaceappschallenge.org/challenges/2022-challenges/carrington-event

As this notebook contains relevant information on DSCOVR.

Done as follows (i.e. from local working copy of 2022 repo):
```bash
git show b2cb88f:./notebooks/data_preparation.ipynb > ../spaceapps-2023-mo/notebooks/rendered_notebooks/oracle_of_dscovr.ipynb
```