feat: max-bot-test initial — full surface coverage

- Slim 4 PSR-15 webhook, PHP-DI 7, Symfony Console 8
- 13 update handlers, 30+ command scenarios, all 7 button types
- Composer pulls pkirillw/max-bot-api-php from GitHub vcs
- Multi-stage Dockerfile (php-fpm 8.4-alpine) + nginx
- docker-compose.yml targets server (npm_default external)
- docker-compose.override.yml for local dev (gitignored)
- .gitea/workflows/deploy.yml mirrors ghost-blog-bot pattern

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

composer.json

@@ -0,0 +1,48 @@
+{
+    "name": "pkirillw/max-bot-test",
+    "description": "Test bot that exercises the full surface area of pkirillw/max-bot-api-php.",
+    "type": "project",
+    "license": "Apache-2.0",
+    "keywords": ["max", "bot", "messenger", "test", "demo"],
+    "require": {
+        "php": "^8.4",
+        "pkirillw/max-bot-api-php": "dev-main@dev",
+        "slim/slim": "^4.0",
+        "nyholm/psr7": "^1.8",
+        "guzzlehttp/guzzle": "^7.0",
+        "guzzlehttp/psr7": "^2.0",
+        "symfony/console": "^7.0 || ^8.0",
+        "symfony/dotenv": "^7.0 || ^8.0",
+        "monolog/monolog": "^3.0",
+        "php-di/php-di": "^7.0",
+        "psr/log": "^3.0"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^10.0 || ^11.0"
+    },
+    "repositories": {
+        "max-bot-api-php": {
+            "type": "vcs",
+            "url": "https://github.com/pkirillw/max-bot-api-php.git"
+        }
+    },
+    "autoload": {
+        "psr-4": {
+            "App\\": "src/"
+        }
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "App\\Tests\\": "tests/"
+        }
+    },
+    "bin": [
+        "bin/console"
+    ],
+    "config": {
+        "sort-packages": true,
+        "allow-plugins": {}
+    },
+    "minimum-stability": "stable",
+    "prefer-stable": true
+}