feat: add Algolia DocSearch (#40)

[posva]

Still waiting for keys to add it to vitepress docs

[posva]

I'm struggling to migrate this component to script setup because I get this runtime error

But that's a TS type. I pushed a version with a dynamic import, which I don't think is normal. I tested using a file that exports types and importing them on a component breaks, so I think that's a bug

[kiaking]

@posva You might wanna try import type { ... } from '...'?

From #137 (comment)

One quirk discovered is that when using <script setup lang="ts"> it is necessary to explicitly mark type imports with import type { X } from '...' otherwise it will be used as a value in the setup return statement. It should be technically possible to avoid this limitation with more sophisticated analysis but for now I don't think it's a deal breaker.

[posva]

This should be good now!

[kiaking]

Niiice!