Update icons for "choose your model/data"

[egrace479]

#12 introduces Lucide icons. We should update all the "Which [product-type] do you need?" to use these icons:

• model icons
• data icons

[egrace479]

Let's also reorder the data page component cards to be the three datasets first, then the benchmarks and all data in the second row.

Should probably say "Which TreeOfLife Dataset or Benchmark do you need?" and update the title to be "TreeOfLife Datasets" (removing the spaces).