Refactor README.md tag list for clarity and completeness

Updated the README.md to reorganize and expand the list of supported M3U8 tags for improved readability. Categories are more granular, and additional tags are now included to give a more comprehensive overview of the functionalities supported. This change aims to make it easier for users to find relevant information quickly.

README.md

@@ -15,12 +15,47 @@ by [RFC 8216](https://tools.ietf.org/html/rfc8216).
 - Parse M3U8 playlists from strings, files, or readers
 - Generate M3U8 playlists and write them to strings, files, or writers
 - Support for all tags specified in RFC 8216, including:
-    - Basic Tags (e.g., `#EXTM3U`, `#EXT-X-VERSION`)
-    - Media Segment Tags (e.g., `#EXTINF`, `#EXT-X-BYTERANGE`)
-    - Media Playlist Tags (e.g., `#EXT-X-TARGETDURATION`, `#EXT-X-MEDIA-SEQUENCE`)
-    - Master Playlist Tags (e.g., `#EXT-X-STREAM-INF`, `#EXT-X-MEDIA`)
-    - Encryption Tags (e.g., `#EXT-X-KEY`, `#EXT-X-SESSION-KEY`)
-    - Date Range Tags (e.g., `#EXT-X-DATERANGE`)
+    - **Basic Tags**:
+        - `#EXTM3U`
+        - `#EXT-X-VERSION`
+    - **Media Playlist Tags**:
+        - `#EXT-X-TARGETDURATION`
+        - `#EXT-X-MEDIA-SEQUENCE`
+        - `#EXT-X-ALLOW-CACHE`
+        - `#EXT-X-DISCONTINUITY-SEQUENCE`
+        - `#EXT-X-MEDIA`
+        - `#EXT-X-STREAM-INF`
+        - `#EXT-X-I-FRAME-STREAM-INF`
+        - `#EXT-X-INDEPENDENT-SEGMENTS`
+        - `#EXT-X-BYTERANGE`
+        - `#EXT-X-SESSION-DATA`
+        - `#EXT-X-SESSION-KEY`
+        - `#EXT-X-DEFINE`
+    - **Media Segment Tags**:
+        - `#EXTINF`
+        - `#EXT-X-KEY`
+        - `#EXT-X-BYTERANGE`
+        - `#EXT-X-MAP`
+        - `#EXT-X-GAP`
+        - `#EXT-X-PROGRAM-DATE-TIME`
+        - `#EXT-X-PART`
+        - `#EXT-X-PRELOAD-HINT`
+        - `#EXT-X-START`
+        - `#EXT-X-DATERANGE`
+    - **Encryption Tags**:
+        - `#EXT-X-KEY`
+        - `#EXT-X-SESSION-KEY`
+    - **Date Range Tags**:
+        - `#EXT-X-DATERANGE`
+    - **End Playlist Tags**:
+        - `#EXT-X-ENDLIST`
+    - **Master Playlist Tags**:
+        - `#EXT-X-STREAM-INF`
+        - `#EXT-X-MEDIA`
+        - `#EXT-X-STREAM-INF`
+        - `#EXT-X-I-FRAME-STREAM-INF`
+    - **Program Date and Time**:
+        - `#EXT-X-PROGRAM-DATE-TIME`
 
 ## Installation
 
@@ -81,3 +116,4 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
   Ok(())
 }
 ```
+