fix: rich logging fix for userids, updated commandlist

add: added bot.date and changed bot.time placeholder. They use timestamp tags now.
fix: fixed double log on server leave

src/NadekoBot/Modules/Administration/Self/SelfService.cs

@@ -71,7 +71,6 @@ public sealed class SelfService : IExecNoCommand, IReadyExecutor, INService
                 if (server.OwnerId != _client.CurrentUser.Id)
                 {
                     await server.LeaveAsync();
-                    Log.Information("Left server {Name} [{Id}]", server.Name, server.Id);
                 }
                 else
                 {