Move search plan from goals to roadmap, add more information for roadmap items

Created by: poojaj-tech

Currently our goals and roadmap items intersect. The goals should explain the why and the roadmap the how.

To make this clearer, as a first step, I’ve moved the plan details from the goals section to under each roadmap item. Additionally, I’ve split out the roadmap into it’s own page and started adding more information for each roadmap item.

To Do: [WIP] Continue adding color for each roadmap item. See previous prioritization notes for more detail. The goals themselves need to be refined. Add sizing for roadmap items.