Add semanticHitCount to /search response (#3368)

Author: guimachiavelli

reference/api/multi_search.mdx

@@ -226,6 +226,7 @@ Federated search requests return a single object and the following fields:
 | **`offset`**             | Number           | Number of documents skipped                                                      |
 | **`limit`**              | Number           | Number of documents to take                                                      |
 | **`estimatedTotalHits`** | Number           | Estimated total number of matches                                                |
+| **`semanticHitCount`**   | Number           | Exhaustive number of semantic search matches (only present in AI-powered searches)                          |
 | **`processingTimeMs`**   | Number           | Processing time of the query                                                     |
 | **`facetsByIndex`**      | Object           | [Data for facets present in the search results](#facetsbyindex)                  |
 | **`facetDistribution`**  | Object           | [Distribution of the given facets](#mergefacets)                                 |

reference/api/search.mdx

@@ -109,6 +109,7 @@ By default, [this endpoint returns a maximum of 1000 results](/learn/resources/k
 | **`limit`**              | Number           | Number of documents to take                                 |
 | **`estimatedTotalHits`** | Number           | Estimated total number of matches                           |
 | **`totalHits`**          | Number           | Exhaustive total number of matches                          |
+| **`semanticHitCount`**   | Number           | Exhaustive number of semantic search matches (only present in AI-powered searches)                          |
 | **`totalPages`**         | Number           | Exhaustive total number of search result pages              |
 | **`hitsPerPage`**        | Number           | Number of results on each page                              |
 | **`page`**               | Number           | Current search results page                                 |
@@ -1218,6 +1219,20 @@ Configures Meilisearch to return search results based on a query's meaning and c
 
 <CodeSamplesSearchParameterGuideHybrid1 />
 
+```json
+{
+  "query": "PLACEHOLDER_QUERY",
+  "processingTimeMs": 10,
+  "limit": 20,
+  "offset": 0,
+  "estimatedTotalHits": 3,
+  "semanticHitCount": 3,
+  "hits": [
+    …
+  ]
+}
+```
+
 ### Vector
 
 **Parameter**: `vector`<br />