Adds Rector for automated code refactoring

Integrates Rector to automate code upgrades and refactoring, enhancing code maintainability and quality.
It also sets up a basic configuration to include the project's source and test directories and imports the assoConnect quality rules.

Author: jwaguet

.github/workflows/build.yml

@@ -16,7 +16,7 @@ jobs:
 
       - uses: shivammathur/setup-php@2.10.0
         with:
-          php-version: '7.4'
+          php-version: '8.2'
 
       - run: composer validate --strict
 

composer.json

@@ -27,9 +27,10 @@
         "phpstan/phpstan": "^1.4",
         "phpstan/phpstan-phpunit": "^1.0",
         "phpstan/phpstan-strict-rules": "^1.1",
-        "roave/no-floaters": "^1.5"
+        "roave/no-floaters": "^1.5",
+        "rector/rector": "^1.2"
     },
     "require": {
-        "php": "^7.4|^8.0"
+        "php": "^8.2"
     }
 }