feat: implement media echo fix and YouTube screenshare design

- Introduced a new `ScreenShareController` to manage YouTube screenshare functionality.
- Updated `DiscordPlayer` to track ownership of audio streams, preventing conflicts between music playback and screenshare.
- Added error handling for various states including voice connection checks and media busy states.
- Created unit tests for `ScreenShareController` and `DiscordPlayer` ownership rules to ensure correct functionality.
- Added documentation for the new media echo fix and screenshare design.

src/recorder.ts

@@ -89,6 +89,8 @@ export async function startRecording(
 
   // Dengarkan siapapun yang mulai bicara
   receiver.speaking.on("start", async (userId) => {
+    if (userId === client.user?.id) return;
+
     const userMetadata = await collectUserMetadata(client, userId, channel);
     logger.info(
       { userId, username: userMetadata.username },