docs: add models

README.md

@@ -50,8 +50,10 @@ Active development. The API is not stable yet and may change in the future.
 - With Tauri: [native_db_tauri_vanilla](https://github.com/vincent-herlemont/native_db_tauri_vanilla)
 
 # Usual API
+- [**Models**](https://docs.rs/native_db/latest/native_db/struct.Models.html)
+    - [**new**](https://docs.rs/native_db/latest/native_db/struct.Models.html#method.new) a new model.
+    - [**define**](https://docs.rs/native_db/latest/native_db/struct.Models.html#method.define) a model.
 - [**Builder**](https://docs.rs/native_db/latest/native_db/struct.Builder.html)  
-    - [**define**](https://docs.rs/native_db/latest/native_db/struct.Builder.html#method.define) a model.
     - [**create**](https://docs.rs/native_db/latest/native_db/struct.Builder.html#method.create) / [**open**](https://docs.rs/native_db/latest/native_db/struct.Builder.html#method.open) a database.
     - [**create_in_memory**](https://docs.rs/native_db/latest/native_db/struct.Builder.html#method.create_in_memory) an in-memory database.
 - [**Database**](https://docs.rs/native_db/latest/native_db/struct.Database.html)