Add PHP Media API scaffold and Docker configs

Initial project scaffold for a PHP Media API including routing, controllers, models and services under api/ (Router, Media/Cast/Image/Settings controllers, models, database/bootstrap files and automatic docs service). Adds Docker support (Dockerfile, docker-compose.yml, DOCKER_README.md, php-custom.ini), .htaccess for pretty URLs, API documentation and example payloads (API_EXAMPLES.md, api/README.md, api_examples/*.json), image handling service and logging, plus a comprehensive .gitignore. This commit provides a runnable development environment and example requests to get the API up and tested quickly.

.gitignore

@@ -0,0 +1,56 @@
+# IDE
+.idea/
+.vscode/
+*.swp
+*.swo
+*~
+
+# OS
+.DS_Store
+Thumbs.db
+Desktop.ini
+
+# Composer
+/vendor/
+composer.lock
+
+# Environment
+.env
+.env.local
+.env.production
+
+# Logs
+*.log
+logs/
+
+# Cache
+/cache/
+/tmp/
+/temp/
+
+# Database
+*.sqlite
+*.db
+
+# Node (if applicable)
+node_modules/
+npm-debug.log
+yarn-error.log
+
+# Docker
+*.pid
+*.seed
+*.pid.lock
+
+# Build artifacts
+/dist/
+/build/
+*.min.js
+*.min.css
+
+# Uploads
+/uploads/
+/storage/app/public/*
+!/storage/app/public/.gitkeep
+*/public/images/*
+/api/public/images