add client-side search

[afeld]

Closes #42.

This is a superset of #69, but the generator has been moved to the jekyll_pages_api gem, and there is now client-side code to do searches, written in Angular (which was a fairly arbitrary choice).

Note that you can ignore anything under assets/components/, as those are all just vendored files.

[afeld]

A couple other things to note:

• Keyboard shortcuts are supported.
  • / to jump to the search box
  • UP/DOWN arrows then ENTER to navigate to a page
• I spent a lot more time on the search interaction than the quality of the results
  • More pages are included than we probably want, e.g. the 404 page. We can make a blacklist, but not sure if there's a more clever way to filter them.
  • Posts aren't included – see include the Posts? jekyll_pages_api#2.
  • The boosts (scoring) could probably use tweaking.

[afeld]

Ok, merged master and removed the unnecessary files – should be much easier to grok now!

[afeld]

Also, I normally don't advocate for rebasing/squashing commits once they're in a PR, but would understand if that were preferable in this case to remove the (essentially) duplicate commits from the split out PRs... let me know.

[mbland]

Yeah, go ahead and squash and rebase and push -f as makes sense.

[msecret]

Why do you need the ul here? Why is .searchresultspopup not specific enough?

[afeld]

Honestly, I copied-and-pasted this file from the URL above – didn't really spend any time cleaning it up. Worth a pass to delete anything we don't need, I gueeeeesssss 😑

[mbland]

Gonna merge now, but opening an issue to address @msecret's comments and the observation that the search box appears to only allow up to nine characters.