Experiments: Add possible suggestion to the empty results response

[marko-bekhta]

Fixes #306

Hey @yrodiere

I was going through some tickets at HSEARCH 😃 and noticed one submitted by the community about suggesters, but without much info. Hence, I thought I'd take a closer look at the suggesters before closing the ticket 🙈 and it turned out to be an interesting feature. This PR tests how we could leverage from it in search.quarkus.io.
While at it, I thought: should we give users a way to manipulate the request JSON before we send it (like in this PR we are adding another top-level element to the JSON, so adding things through e.g. a JSON predicate, wouldn't really work...)

Some links:

• https://www.elastic.co/guide/en/elasticsearch/reference/current/search-suggesters.html
• https://lucene.apache.org/core/10_0_0/suggest/index.html

[yrodiere]

The feature seems nice, +1 to add it.

A few comments below though :)

[marko-bekhta]

ok... played with it a bit more so it's more usable on the actual site, and user can click to get the results:

[yrodiere]

ok... played with it a bit more so it's more usable on the actual site, and user can click to get the results:

Ready to merge, then? :)

[yrodiere]

Also, should we mark this as fixing #306? @rsvoboda , is this enough to address your problem?

[marko-bekhta]

rebased the pr, but let's get the relevance PR in first (#402)

[rsvoboda]

@marko-bekhta / @yrodiere is there a stage instance I could play with?

[yrodiere]

@marko-bekhta / @yrodiere is there a stage instance I could play with?

There is, but it's based on main, so we need to merge this in order for you to play with it.

I guess we will soon enough, Marko is trying to get CI to pass :)

[marko-bekhta]

I guess we will soon enough, Marko is trying to get CI to pass :)

yeah 😄 those not sorted imports ... 😄

[rsvoboda]

I checked the code and this could fix my #306 concern.

Maybe the tests could cover cases mentioned in the issue. Or I can add them later. It's up to you guys :)

[marko-bekhta]

Added a few more test queries, including the missing ones from the ticket description 😃; let's see if the build will pass on CI 🤞🏻