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/get_tracks.json

@@ -0,0 +1,23 @@
+{
+  "success": true,
+  "data": {
+    "items": [
+      {
+        "id": 1,
+        "media_id": 3,
+        "track_number": 1,
+        "title": "Speak to Me",
+        "duration": "1:30",
+        "artist": "Pink Floyd"
+      },
+      {
+        "id": 2,
+        "media_id": 3,
+        "track_number": 2,
+        "title": "Breathe",
+        "duration": "2:43",
+        "artist": "Pink Floyd"
+      }
+    ]
+  }
+}