Add HLS.js support and enhance content streaming logic

- Integrated HLS.js version 1.6.15 into the project for improved video streaming capabilities.
- Updated the ContentsController to check for HLS manifest availability and fall back to presigned URLs for original files if not found.
- Enhanced the VideoPlayer component to handle loading and error states more effectively, improving user experience during streaming.
- Refactored content service methods to return detailed streaming information, including HLS and DASH manifest URLs.

package.json

@@ -24,6 +24,7 @@
     "applesauce-relay": "^5.1.0",
     "applesauce-signers": "^5.1.0",
     "axios": "^1.13.5",
+    "hls.js": "^1.6.15",
     "nostr-tools": "^2.23.0",
     "pinia": "^3.0.4",
     "qrcode": "^1.5.4",