Add data visulization review page to main

[jdwilkin4]

Once the two workshops have been audited and updated, and the lectures are complete, then we can create the review page for this.

The review page should mainly consist of general introduction to data visualization as well as the basics of d3 covered in the workshops.

[Allan70]

Hello! I am v__digital on Discord, and I am a part of Naomi's Full Stack Developer Cohort. I would like to take care of this issue as part of her guided sprint.

[majestic-owl448]

@Allan70 this issue is not for the cohort, look at the labels