feat: implement server logging functionality

- Added a logging service to manage server event logs including message edits, deletions, member joins/leaves, and moderation actions.
- Introduced commands to configure logging settings, including setting the log channel and enabling/disabling logging.
- Updated the README to document the new logging features and commands.
- Enhanced moderation commands to log actions taken on members.

internal/bot/bot.go

@@ -34,8 +34,10 @@ func NewBot(token, appID, guildID, lavalinkHost, lavalinkPass string, cmds []*di
 	// - VoiceStateUpdate (meeting lobby): GuildVoiceStates
 	// - MessageReactionAdd (scheduling via reactions): GuildMessageReactions + DirectMessageReactions
 	session.Identify.Intents = discordgo.IntentsGuilds |
+		discordgo.IntentsGuildBans |
 		discordgo.IntentsGuildMembers |
 		discordgo.IntentsGuildMessages |
+		discordgo.IntentsMessageContent |
 		discordgo.IntentsGuildVoiceStates |
 		discordgo.IntentsGuildMessageReactions |
 		discordgo.IntentsDirectMessages |
@@ -76,7 +78,39 @@ func (b *Bot) Start() error {
 	})
 
 	b.Session.AddHandler(func(s *discordgo.Session, m *discordgo.GuildMemberAdd) {
+		events.HandleBotAddedOnGuild(s, m, b.Services)
+
+		// Ignore bot members for welcome/log onboarding of normal users.
+		if m != nil && m.Member != nil && m.User != nil && m.User.Bot {
+			return
+		}
+
 		events.HandleGuildMemberAdd(s, m, b.Services)
+		events.HandleGuildMemberAddLog(s, m, b.Services)
+	})
+
+	b.Session.AddHandler(func(s *discordgo.Session, m *discordgo.GuildMemberRemove) {
+		events.HandleGuildMemberRemoveLog(s, m, b.Services)
+	})
+
+	b.Session.AddHandler(func(s *discordgo.Session, m *discordgo.GuildMemberUpdate) {
+		events.HandleGuildMemberUpdateLog(s, m, b.Services)
+	})
+
+	b.Session.AddHandler(func(s *discordgo.Session, m *discordgo.MessageUpdate) {
+		events.HandleMessageUpdateLog(s, m, b.Services)
+	})
+
+	b.Session.AddHandler(func(s *discordgo.Session, m *discordgo.MessageDelete) {
+		events.HandleMessageDeleteLog(s, m, b.Services)
+	})
+
+	b.Session.AddHandler(func(s *discordgo.Session, m *discordgo.GuildBanAdd) {
+		events.HandleGuildBanAddLog(s, m, b.Services)
+	})
+
+	b.Session.AddHandler(func(s *discordgo.Session, m *discordgo.GuildBanRemove) {
+		events.HandleGuildBanRemoveLog(s, m, b.Services)
 	})
 
 	b.Session.AddHandler(func(s *discordgo.Session, vs *discordgo.VoiceStateUpdate) {