style: add trailing commas and fix code formatting

Author: valbeat

src/Err.php

@@ -19,7 +19,7 @@
      * @param E $value
      */
     public function __construct(
-        private mixed $value
+        private mixed $value,
     ) {
     }
 

src/Ok.php

@@ -19,9 +19,8 @@
      * @param T $value
      */
     public function __construct(
-        private mixed $value
-    )
-    {
+        private mixed $value,
+    ) {
     }
 
     #[Override]

src/Result.php

@@ -12,7 +12,6 @@
  */
 abstract readonly class Result
 {
-
     /**
      * 結果が成功（Ok）の場合に true を返します.
      *