Add documentation on #[Encrypt] attribute

Author: GromNaN

docs/en/reference/attributes-reference.rst

@@ -336,6 +336,40 @@ Unlike normal documents, embedded documents cannot specify their own database or
 collection. That said, a single embedded document class may be used with
 multiple document classes, and even other embedded documents!
 
+#[Encrypt]
+----------
+
+The `#[Encrypt]` attribute is used to define an encrypted field mapping for a document property. It allows you to configure fields for encryption and queryable encryption in MongoDB.
+
+Optional arguments:
+
+- ``queryType`` - Specifies the query type for the field. Possible values:
+  - ``null`` (default) - Field is not queryable.
+  - ``QUERY_TYPE_EQUALITY`` - Enables equality queries.
+  - ``QUERY_TYPE_RANGE`` - Enables range queries.
+- ``min``, ``max`` - Specify minimum and maximum (inclusive) queryable values fora field when possible, as smaller bounds improve query efficiency. If querying values outside of these bounds, MongoDB returns an error.
+- ``sparsity``, ``prevision``, ``trimFactor``, ``contention`` - For advanced users only. The default values for these options are suitable for the majority of use cases, and should only be modified if your use case requires it.
+
+Example:
+
+.. code-block:: php
+
+    <?php
+
+    use Doctrine\ODM\MongoDB\Mapping\Annotations\Encrypt;
+
+    #[Document]
+    class Client
+    {
+        // ...
+
+        #[Field]
+        #[Encrypt(queryType: Encrypt::QUERY_TYPE_EQUALITY)]
+        public string $name;
+    }
+
+For more details, refer to the MongoDB documentation on [Queryable Encryption](https://www.mongodb.com/docs/manual/core/queryable-encryption/fundamentals/encrypt-and-query/).
+
 #[Field]
 --------