Change the filterableAttributes setting API

**Changes:**
The filterableAttributes type has been changed from a `BTreeSet<String>` to a `Vec<FilterableAttributesRule>`,
Which is a list of rules defining patterns to match the documents' fields and a set of feature to apply on the matching fields.
The rule order given by the user is now an important information, the features applied on a filterable field will be chosen based on the rule order as we do for the LocalizedAttributesRules.
This means that the list will not be reordered anymore and will keep the user defined order,
moreover, if there are any duplicates, they will not be de-duplicated anymore.

**Impact:**
- Settings API
- the database format of the filterable attributes changed
- may impact the LocalizedAttributesRules due to the AttributePatterns factorization
- OpenAPI generator

crates/milli/src/lib.rs

@@ -9,12 +9,14 @@ pub static ALLOC: mimalloc::MiMalloc = mimalloc::MiMalloc;
 pub mod documents;
 
 mod asc_desc;
+mod attribute_patterns;
 mod criterion;
 pub mod database_stats;
 mod error;
 mod external_documents_ids;
 pub mod facet;
 mod fields_ids_map;
+mod filterable_attributes_rules;
 pub mod heed_codec;
 pub mod index;
 mod localized_attributes_rules;
@@ -52,6 +54,8 @@ pub use thread_pool_no_abort::{PanicCatched, ThreadPoolNoAbort, ThreadPoolNoAbor
 pub use {charabia as tokenizer, heed, rhai};
 
 pub use self::asc_desc::{AscDesc, AscDescError, Member, SortError};
+pub use self::attribute_patterns::AttributePatterns;
+pub use self::attribute_patterns::PatternMatch;
 pub use self::criterion::{default_criteria, Criterion, CriterionError};
 pub use self::error::{
     Error, FieldIdMapMissingEntry, InternalError, SerializationError, UserError,
@@ -59,6 +63,10 @@ pub use self::error::{
 pub use self::external_documents_ids::ExternalDocumentsIds;
 pub use self::fieldids_weights_map::FieldidsWeightsMap;
 pub use self::fields_ids_map::{FieldsIdsMap, GlobalFieldsIdsMap};
+pub use self::filterable_attributes_rules::{
+    FilterFeatures, FilterableAttributesFeatures, FilterableAttributesPatterns,
+    FilterableAttributesRule,
+};
 pub use self::heed_codec::{
     BEU16StrCodec, BEU32StrCodec, BoRoaringBitmapCodec, BoRoaringBitmapLenCodec,
     CboRoaringBitmapCodec, CboRoaringBitmapLenCodec, FieldIdWordCountCodec, ObkvCodec,
@@ -67,7 +75,6 @@ pub use self::heed_codec::{
 };
 pub use self::index::Index;
 pub use self::localized_attributes_rules::LocalizedAttributesRule;
-use self::localized_attributes_rules::LocalizedFieldIds;
 pub use self::search::facet::{FacetValueHit, SearchForFacetValues};
 pub use self::search::similar::Similar;
 pub use self::search::{