move the federation objects to their own file

src/Contracts/FederationOptions.php

@@ -0,0 +1,24 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Meilisearch\Contracts;
+
+class FederationOptions
+{
+    private ?float $weight = null;
+
+    public function setWeight(float $weight): FederationOptions
+    {
+        $this->weight = $weight;
+
+        return $this;
+    }
+
+    public function toArray(): array
+    {
+        return array_filter([
+            'weight' => $this->weight,
+        ], static function ($item) { return null !== $item; });
+    }
+}

src/Contracts/MultiSearchFederation.php

@@ -0,0 +1,33 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Meilisearch\Contracts;
+
+class MultiSearchFederation
+{
+    private ?int $limit = null;
+    private ?int $offset = null;
+
+    public function setLimit(int $limit): MultiSearchFederation
+    {
+        $this->limit = $limit;
+
+        return $this;
+    }
+
+    public function setOffset(int $offset): MultiSearchFederation
+    {
+        $this->offset = $offset;
+
+        return $this;
+    }
+
+    public function toArray(): array
+    {
+        return array_filter([
+            'limit' => $this->limit,
+            'offset' => $this->offset,
+        ], static function ($item) { return null !== $item; });
+    }
+}

src/Contracts/SearchQuery.php

@@ -4,53 +4,6 @@
 
 namespace Meilisearch\Contracts;
 
-class MultiSearchFederation
-{
-    private ?int $limit = null;
-    private ?int $offset = null;
-
-    public function setLimit(int $limit): MultiSearchFederation
-    {
-        $this->limit = $limit;
-
-        return $this;
-    }
-
-    public function setOffset(int $offset): MultiSearchFederation
-    {
-        $this->offset = $offset;
-
-        return $this;
-    }
-
-    public function toArray(): array
-    {
-        return array_filter([
-            'limit' => $this->limit,
-            'offset' => $this->offset,
-        ], static function ($item) { return null !== $item; });
-    }
-}
-
-class FederationOptions
-{
-    private ?float $weight = null;
-
-    public function setWeight(float $weight): FederationOptions
-    {
-        $this->weight = $weight;
-
-        return $this;
-    }
-
-    public function toArray(): array
-    {
-        return array_filter([
-            'weight' => $this->weight,
-        ], static function ($item) { return null !== $item; });
-    }
-}
-
 class SearchQuery
 {
     private string $indexUid;