Refactor setModel method to support chaining

The setModel method in the Query class has been refactored to support better chaining. Instead of creating a new Query instance with the new model, the existing Query instance is cloned, its model is updated, and then returned. This change aims to bring better consistency with other methods and improve the overall usability and predictability of the Query API. Moreover, it addresses the deprecation warning by conforming to the method signature.

Author: Radiergummi

src/Query.php

@@ -247,14 +247,14 @@ public function getModel(): Model
      * @template TModel of Model
      *
      * @param Model $model Model to use for the current query.
-     *
      * @psalm-param TModel $model
      *
-     * @return self<TModel> Query builder instance for chaining.
+     * @return static<TModel> Query builder instance for chaining.
      * @noinspection PhpDeprecationInspection
      */
-    public function setModel(Model $model): self
+    public function setModel(Model $model): static
     {
+        /** @var static<TModel> $query */
         $query = clone $this;
         $query->connection = $this->getConnection();
         $query->model = $model;