Added additional css to notebook output webviews

[jonah-iden]

What it does

Added additional css for styling tables to notebook output webviews. Recreating the style vscode has.
injectable so this can be more easily be overwritten to add addtional css in custom IDEs

How to test

Create a notebook with a cell like the following and execute it. The table should look nice

import pandas as pd

pd.DataFrame(
    data={
        "Col1HasAVeryLongName": [1, 2, 4],
        "Col2MediumName": [4, 5, 6],
        "Col3": [7, 8, 11],
    }
)

Follow-ups

Review checklist

• As an author, I have thoroughly tested my changes and carefully followed the review guidelines

Reminder for reviewers

• As a reviewer, I agree to behave in accordance with the review guidelines

[msujew]

Looks good, thanks 👍