4938: Remove default embedder r=ManyTheFish a=dureuill
# Pull Request
## Related issue
Fixes#4738
## What does this PR do?
[See public usage](https://meilisearch.notion.site/v1-11-AI-search-changes-0e37727193884a70999f254fa953ce6e#1044b06b651f80edb9d4ef6dc367bad0)
- Remove `hybrid.embedder` boolean from analytics because embedder is now mandatory and so the boolean would always be `true`
- Rework search kind so that a search without query but with vector is a vector search regardless of (non-zero) semantic ratio
Co-authored-by: Louis Dureuil <louis@meilisearch.com>
4939: Introduce the `STARTS WITH` filter operator r=irevoire a=Kerollmops
This PR fixes#4872 by introducing the `STARTS WITH` filter operator and gating it under the _contains filter_ experimental feature along with the `CONTAINS` one. I also updated [the experimental feature discussion page](https://github.com/orgs/meilisearch/discussions/763).
Co-authored-by: Clément Renault <clement@meilisearch.com>
4929: Add facets support to federated r=Kerollmops a=dureuill
# Pull Request
## Related issue
- Fixes#4932 (sprint issue)
- Fixes #4913 (user-opened issue)
## What does this PR do?
See [public usage](https://meilisearch.notion.site/v1-11-Federated-search-59b30e03383c40729d7541a3dffb0069)
> [!CAUTION]
> This PR introduces a 🚨**breaking change**🚨: `queries.facets` when `federation` is present and non-`null` is now **an error**
### Implementation standpoint:
- Facet distribution: fix issue where truncated facet distribution would have a wrong order
- facet distribution: implement Display for OrderBy
Co-authored-by: Louis Dureuil <louis@meilisearch.com>
4937: Support iso 639 1 r=ManyTheFish a=ManyTheFish
# Pull Request
## Related issue
Fixes#4827
## What does this PR do?
- Add iso-639-1 variants to the Locales enum
- Convert iso-639-1 into iso-639-3
Co-authored-by: ManyTheFish <many@meilisearch.com>
