feat: implement Opus demuxing for browser streams, cache headers for playback, and enable microphone input in recorder

.env.example

@@ -1,8 +0,0 @@
-# Discord Bot Token (dari Discord Developer Portal)
-DISCORD_TOKEN=""
-
-# ID Channel Voice yang ingin di-join bot saat startup
-VOICE_CHANNEL_ID=
-GUILD_ID=
-# Folder penyimpanan rekaman (opsional, default: ./recordings)
-RECORDINGS_DIR=./recordings