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.

api_examples/create_album.json

@@ -0,0 +1,28 @@
+{
+  "title": "Thriller",
+  "year": 1982,
+  "poster": "https://example.com/thriller-cover.jpg",
+  "description": "Sixth studio album by Michael Jackson",
+  "rating": 9.0,
+  "category": "Music",
+  "type": "Album",
+  "status": "Released",
+  "genres": ["Pop", "Funk", "Rock"],
+  "tags": ["Classic", "Best-selling"],
+  "studios": ["Epic Records"],
+  "staff": [],
+  "tracks": [
+    {
+      "track_number": 1,
+      "title": "Wanna Be Startin' Somethin'",
+      "duration": "6:03",
+      "artist": "Michael Jackson"
+    },
+    {
+      "track_number": 2,
+      "title": "Baby Be Mine",
+      "duration": "4:20",
+      "artist": "Michael Jackson"
+    }
+  ]
+}