[4.4] update cs and add missing @return

[kenjis]

Description
Now 4.4 branch is broken.

• update cs and add missing @return

   1) user_guide_src/source/outgoing/response/003.php (blank_line_before_statement)
      ---------- begin diff ----------
--- /home/runner/work/CodeIgniter4/CodeIgniter4/user_guide_src/source/outgoing/response/003.php
+++ /home/runner/work/CodeIgniter4/CodeIgniter4/user_guide_src/source/outgoing/response/003.php
@@ -6,5 +6,6 @@
 ];
 
 return $this->response->setJSON($data);
+
 // or
 return $this->response->setXML($data);

      ----------- end diff -----------

 Error: Method CodeIgniter\Exceptions\FrameworkException::forCopyError() has no return type specified.
 ------ ---------------------------------------------------------------------- 
  Line   system/Exceptions/FrameworkException.php                              
 ------ ---------------------------------------------------------------------- 
  50     Method CodeIgniter\Exceptions\FrameworkException::forCopyError() has  
         no return type specified.                                             
 ------ ---------------------------------------------------------------------- 

Checklist:

• Securely signed commits
• [] Component(s) with PHPDoc blocks, only if necessary or adds value
• [] Unit testing, with >80% coverage
• [] User guide updated
• Conforms to style guide

[kenjis]

Now 4.4 branch is broken. Please review.