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>

.gitignore

@@ -0,0 +1,12 @@
+.env
+.env.local
+vendor/
+storage/logs/*
+!storage/logs/.gitkeep
+storage/uploads/*
+!storage/uploads/.gitkeep
+.phpunit.result.cache
+.phpunit.cache/
+.idea/
+.DS_Store
+docker-compose.override.yml