feat: add searchable capability to email field type

Author: ManukMinasyan

src/FieldTypeSystem/Definitions/EmailFieldType.php

@@ -27,6 +27,7 @@ public function configure(): FieldSchema
             ->tableColumn(TextColumn::class)
             ->infolistEntry(TextEntry::class)
             ->priority(15)
+            ->searchable()
             ->sortable()
             ->supportsMultiValue()
             ->withArbitraryValues()