Move codeigniter4/framework to require-dev

To avoid dependabot error in CodeIgniter 4 repo, see https://github.com/codeigniter4/CodeIgniter4/network/updates/953278072

Author: samsonasik

composer.json

@@ -23,10 +23,10 @@
     },
     "require": {
         "php": "^8.1",
-        "codeigniter4/framework": "^4.5",
         "phpstan/phpstan": "^2.0"
     },
     "require-dev": {
+        "codeigniter4/framework": "^4.5",
         "codeigniter/coding-standard": "^1.7",
         "codeigniter4/shield": "^1.0",
         "friendsofphp/php-cs-fixer": "^3.49",