Initial commit: sheepflix media streaming API

Go API for browsing/searching media files with ffprobe metadata,
token auth, and go-transcode integration for HLS streaming.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docker-compose.yml

@@ -0,0 +1,13 @@
+services:
+  sheepflix:
+    build: .
+    devices:
+      - /dev/dri:/dev/dri
+    volumes:
+      - /mnt/user/media:/media:ro
+    ports:
+      - "8091:8091"
+    environment:
+      - MEDIA_DIR=/media
+      - LISTEN_ADDR=:8091
+    restart: unless-stopped