feat: integrate music commands with Lavalink support

- Added new music commands: play, queue, and volume.
- Implemented music management using disgolink for Lavalink integration.
- Updated bot initialization to include Lavalink host and password.
- Enhanced interaction handling for music commands, requiring DJ role for usage.
- Introduced now playing message with interactive buttons for controlling playback.
- Updated dependencies in go.mod for disgolink and snowflake.

internal/music/repeat_buttons.go

@@ -0,0 +1,18 @@
+package music
+
+import "github.com/bwmarrin/discordgo"
+
+func updateNowPlayingButtons(channelID, messageID string, guildID string) {
+	if manager == nil || channelID == "" || messageID == "" {
+		return
+	}
+	repeatSong, repeatQueue := repeatFlags(guildID)
+	paused, _ := pausedAndVolume(guildID)
+	comps := nowPlayingComponents(false, repeatSong, repeatQueue, paused)
+	_, _ = manager.session.ChannelMessageEditComplex(&discordgo.MessageEdit{
+		Channel:    channelID,
+		ID:         messageID,
+		Components: &comps,
+	})
+}
+