evans: lazy/dynamic import of algolia search lib

[jaredh159]

this is probably used only by a small percentage of visitors, and has a considerable bundle-size effect. it would be great to lazy-load it, like the checkout component.

i tried this once, but reverted it because i couldn't fix an issue on iOS where during the lazy load of the component, the search input field would lose focus and become basically unusable, so we need to carefully check it in a couple browsers and devices before going to prod.

it would be ideal to measure the build size before and after as well.