How to make a Rust help command plugin (paged /help list from config)

using System.Linq;
using System;
using System.Collections.Generic;
using Newtonsoft.Json;
using Oxide.Core;

namespace Oxide.Plugins
{
    [Info("Help Command", "RustPluginGenerator", "1.0.0")]
    [Description("Shows a paged list of server commands and descriptions stored in the config.")]
    public class HelpCommand : RustPlugin
    {
        private const int PageSize = 8;

        private PluginConfig config;

        private class PluginConfig
        {
            [JsonProperty("Header (use {0} for page, {1} for total pages)")]
            public string Header = "Server commands - page {0}/{1}";

            [JsonProperty("Footer")]
            public string Footer = "Type /help <page> for more.";

            [JsonProperty("Commands")]
            public List<CommandEntry> Commands = new List<CommandEntry>
            {
                new CommandEntry { Command = "/kit", Description = "Claim your starter kit", ShowInHelp = true },
                new CommandEntry { Command = "/trade <player>", Description = "Send a trade request", ShowInHelp = true },
                new CommandEntry { Command = "/tp", Description = "Teleport request", ShowInHelp = true },
                new CommandEntry { Command = "/report <player> <reason>", Description = "Report a player", ShowInHelp = true }
            };
        }

        private class CommandEntry
        {
            [JsonProperty("Command")]
            public string Command = "/command";

            [JsonProperty("Description")]
            public string Description = "What it does";

            [JsonProperty("Show in help")]
            public bool ShowInHelp = true;
        }

        protected override void LoadDefaultConfig() => config = new PluginConfig();

        protected override void LoadConfig()
        {
            base.LoadConfig();
            try
            {
                config = Config.ReadObject<PluginConfig>();
                if (config == null || config.Commands == null)
                    throw new Exception();
            }
            catch
            {
                PrintWarning("Configuration file is invalid, using defaults");
                LoadDefaultConfig();
            }
            SaveConfig();
        }

        protected override void SaveConfig() => Config.WriteObject(config);

        protected override void LoadDefaultMessages()
        {
            lang.RegisterMessages(new Dictionary<string, string>
            {
                ["Header"] = "Server commands - page {0}/{1}",
                ["Line"] = "{0} - {1}",
                ["Footer"] = "Type /help <page> for more.",
                ["NoSuchPage"] = "There is no page {0}. Use /help 1.",
                ["NoCommands"] = "No commands are listed right now.",
                ["WrongUsage"] = "Usage: /help or /help <page>"
            }, this);
        }

        private void Init()
        {
            cmd.AddChatCommand("help", this, nameof(CmdHelp));
        }

        private void CmdHelp(BasePlayer player, string command, string[] args)
        {
            if (player == null || config == null || config.Commands == null)
                return;

            var visible = new List<CommandEntry>();
            foreach (var entry in config.Commands)
            {
                if (entry != null && entry.ShowInHelp && !string.IsNullOrEmpty(entry.Command))
                    visible.Add(entry);
            }

            if (visible.Count == 0)
            {
                SendReply(player, Msg("NoCommands", player.UserIDString));
                return;
            }

            int page = 1;
            if (args != null && args.Length > 0)
            {
                if (!int.TryParse(args[0], out page))
                    page = 1;
            }
            if (page < 1)
                page = 1;

            int pageCount = (int)Math.Ceiling(visible.Count / (double)PageSize);
            if (page > pageCount)
            {
                SendReply(player, Msg("NoSuchPage", player.UserIDString, page));
                return;
            }

            SendReply(player, Msg("Header", player.UserIDString, page, pageCount));

            int start = (page - 1) * PageSize;
            int end = Math.Min(start + PageSize, visible.Count);
            for (int i = start; i < end; i++)
            {
                var entry = visible[i];
                SendReply(player, Msg("Line", player.UserIDString, entry.Command, entry.Description));
            }

            if (!string.IsNullOrEmpty(config.Footer))
                SendReply(player, Msg("Footer", player.UserIDString));
        }

        private string Msg(string key, string userId = null, params object[] args)
        {
            return string.Format(lang.GetMessage(key, this, userId), args);
        }
    }
}