refactor(deps): replace laminas-servicemanager with lightweight PSR-11 container

Drop laminas/laminas-servicemanager to avoid downstream dependency
conflicts. Introduce a minimal SimpleContainer that implements
PSR-11 ContainerInterface and supports the Mezzio ConfigProvider
format (factories, aliases, invokables, delegators).

- Add src/Container/SimpleContainer.php
- Update config/container.php to use SimpleContainer
- Widen psr/container to ^1.1 || ^2.0 (matching Symfony/Mezzio convention)
- Remove slam/phpstan-laminas-framework (tied to ServiceManager)
- Remove tests/phpstan-container.php (no longer needed)

Author: Fahl-Design

composer.json

@@ -18,7 +18,6 @@
     "devizzent/cebe-php-openapi": "^1.1.5",
     "fakerphp/faker": "^1.24.1",
     "laminas/laminas-diactoros": "^3.8",
-    "laminas/laminas-servicemanager": "^3.24 || ^4.0",
     "league/openapi-psr7-validator": "^0.22",
     "mezzio/mezzio": "^3.27",
     "mezzio/mezzio-fastroute": "^3.14",
@@ -49,7 +48,6 @@
     "phpstan/phpstan-webmozart-assert": "^2.0.0",
     "rector/rector": "^2.3.9",
     "roave/security-advisories": "dev-master",
-    "slam/phpstan-laminas-framework": "^2.0",
     "webproject-xyz/codeception-module-ai-reporter": "^1.1.0"
   },
   "autoload": {