Merge #4667

4667: Frequency matching strategy r=Kerollmops a=ManyTheFish

# Pull Request

## Related issue
Fixes #3773

## What does this PR do?
- add test for matching strategy
- implement frequency matching strategy

See the [PRD for more details](https://www.notion.so/meilisearch/Frequency-Matching-Strategy-0f3ba08833a442a39590a53a1505ab00).

[Public API](https://www.notion.so/meilisearch/frequency-matching-strategy-89868fb7fc584026bc56e378eb854a7f).


Co-authored-by: ManyTheFish <many@meilisearch.com>

meilisearch/src/search.rs

@@ -477,6 +477,8 @@ pub enum MatchingStrategy {
     Last,
     /// All query words are mandatory
     All,
+    /// Remove query words from the most frequent to the least
+    Frequency,
 }
 
 impl Default for MatchingStrategy {
@@ -490,6 +492,7 @@ impl From<MatchingStrategy> for TermsMatchingStrategy {
         match other {
             MatchingStrategy::Last => Self::Last,
             MatchingStrategy::All => Self::All,
+            MatchingStrategy::Frequency => Self::Frequency,
         }
     }
 }