Add @mediabunny/ac3 extension package

src/conversion.ts

@@ -773,6 +773,13 @@ export class Conversion {
 						`\nThe @mediabunny/mp3-encoder extension package provides support for encoding MP3.`,
 					);
 				}
+
+				if (codecs.includes('ac3') || codecs.includes('eac3')) {
+					elements.push(
+						'\nThe @mediabunny/ac3 extension package provides support'
+						+ ' for encoding and decoding AC-3/E-AC-3.',
+					);
+				}
 			} else {
 				elements.push('\nCheck the discardedTracks field for more info.');
 			}