Update docs a bunch, fix some typos

docs/guide/input-formats.md

@@ -33,6 +33,7 @@ import {
 	ADTS, // ADTS input format singleton
 	FLAC, // FLAC input format singleton
 	MPEG_TS, // MPEG-TS input format singleton
+	HLS, // HLS input format singleton
 } from 'mediabunny';
 ```
 
@@ -82,6 +83,7 @@ In addition to singletons, input format classes are structured hierarchically:
 	- `AdtsInputFormat`
 	- `FlacInputFormat`
 	- `MpegTsInputFormat`
+	- `HlsInputFormat`
 
 This means you can also perform input format checks using `instanceof` instead of `===` comparisons. For example:
 ```ts