chore: introduce static code anlysis

Author: Forestsoft-de

composer.json

@@ -29,13 +29,16 @@
   "require-dev": {
     "phpunit/phpunit": "^11.5.2",
     "symplify/easy-coding-standard": "12.5.16",
-    "testcontainers/testcontainers": "1.0.2"
+    "testcontainers/testcontainers": "1.0.2",
+    "phpstan/phpstan": "^2.1"
   },
   "scripts": {
     "analyze": "vendor/bin/ecs check",
     "format": "vendor/bin/ecs check --fix",
+    "stan": " vendor/bin/phpstan analyze -l 5 src tests",
     "qa": [
       "composer analyze",
+      "composer stan",
       "composer test"
     ],
     "test": "vendor/bin/phpunit"