Add search using the same technique as the guides

[jenweber]

Right now, we don't have search at all. Whatever happens here, the same work will be useful for the Ember Guides, and vice versa!

[jenweber]

My goal for initial launch of the CLI guides w/the website redesign is to achieve feature parity with a refreshed look, so I do not think this should be a blocker to ship.

It would be an excellent feature to include if someone is inspired to work on it, and broadly it does need to be done, regardless of applying new designs.

[MelSumner]

+1 for this issue; what is the next step to make this idea happen?