chore: upgrade laravel/pint to fix PHP 8.4 deprecations + remove psalm (#160)

* chore: upgrade laravel/pint to ^1.21 and apply formatting

Bumps laravel/pint from 1.2.* (v1.2.1, 2022) to ^1.21 (v1.27.1) to
eliminate PHP 8.4 deprecation warnings about implicitly nullable
parameters. Applies pint formatting across all src and test files.

* format

* remove psalm

Author: ChiragAgg5k

composer.json

@@ -26,9 +26,8 @@
         "utopia-php/validators": "0.2.*"
     },
     "require-dev": {
-        "phpunit/phpunit": "^9.3",
-        "vimeo/psalm": "4.0.1",
-        "laravel/pint": "1.2.*"
+        "laravel/pint": "^1.21",
+        "phpunit/phpunit": "^9.3"
     },
     "config": {
         "allow-plugins": {