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/commands/help/help.go

@@ -133,6 +133,13 @@ func HelpHandler(s *discordgo.Session, i *discordgo.InteractionCreate) {
 					"`/config setwelcomegif url:<image-url>` — GIF/image used in welcome embed\n" +
 					"`/config setdefaultrole role:@role` — Role granted to new members",
 			},
+			{
+				Name: "Logging (**Manage Server**)",
+				Value: "" +
+					"`/config setlogchannel channel:#channel` — Set log output channel\n" +
+					"`/config enablelogging` — Enable event/moderation logging\n" +
+					"`/config disablelogging` — Disable event/moderation logging",
+			},
 			{
 				Name:  "Other",
 				Value: "`/help` — Show this help in DMs",