/index beautification

[peytondmurray]

Name of page to be edited
/index

Description / reason for change
Currently, the landing page is a table of text. Let's make it more attractive with some images, possibly some content in a grid, or possibly a grid of cards.

Previous content:
https://github.com/observational-dev/oawiki/blob/main/src/index.md

Updated content:
This issue is to get the conversation started, and to track and propose design changes.