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/commands/music/public/permissions.go

@@ -0,0 +1,36 @@
+package public
+
+import "github.com/bwmarrin/discordgo"
+
+func memberHasDJRole(s *discordgo.Session, guildID string, m *discordgo.Member) bool {
+	if s == nil || guildID == "" || m == nil {
+		return false
+	}
+	if len(m.Roles) == 0 {
+		return false
+	}
+
+	roles, err := s.GuildRoles(guildID)
+	if err != nil {
+		return false
+	}
+
+	djRoleID := ""
+	for _, r := range roles {
+		if r != nil && r.Name == "DJ" {
+			djRoleID = r.ID
+			break
+		}
+	}
+	if djRoleID == "" {
+		return false
+	}
+
+	for _, rid := range m.Roles {
+		if rid == djRoleID {
+			return true
+		}
+	}
+	return false
+}
+