Add : RxRx19a COVID-19 Image Embeddings

[peshotan]

The dataset can be found here:
https://www.kaggle.com/tunguz/rxrx19a

Please perform the following tasks for this dataset:

1. Create a dataset-details page and fill in all the relevant info.
2. Generate pandas-profile webpage and add the link to the webpage as described in how to contribute page.
3. Add your .py script that was used to generate the pandas-profile report to scripts directory.
4. After adding all the files. Please comment on this issue with the link which is to be added to README.md. For example the typical link would look like this * ![OK_ICON](https://github.com/sfu-db/covid19-datasets/blob/master/assets/ok_icon.png)[**Name_of_your_dataset**](/datasets-details/**name_of_your_dataset.md**). Please do NOT add this to README.md by yourself, the page owners/collaborators will add them.

PMP RAs - Please feel to assign this to yourself by commenting on it and I will assign this to you. Also please don't forget to fetch and rebase the upstream before working on/ submitting your PR.