Demo workflow to render data api item previews on a web map

[strixcuriosus]

Create a lightweight, python version of some of the "Explorer Experience" where we can immediately render webtiles on a map to visualize previews of Data API Search results.

Demonstrating this workflow can enable more developers to leverage the same APIs and services that Planet Explorer uses.
Some benefits:

• preview tiles can be viewed immediately with no waiting for async activation/download/delivery
• streaming preview tiles can be a building block toward other workflows, e.g. automated review prior to order placement
• some insights are immediately derivable from preview tiles (e.g. presence of a large airplane, for example, can be visually seen directly from the preview tiles)