Added in memory caching

KfChatDotNetBot/Commands/CacheCommands.cs

@@ -0,0 +1,27 @@
+using System.Runtime.Caching;
+using System.Text.RegularExpressions;
+using KfChatDotNetBot.Models.DbModels;
+using KfChatDotNetWsClient.Models.Events;
+
+namespace KfChatDotNetBot.Commands;
+
+public class CacheClearCommand : ICommand
+{
+    public List<Regex> Patterns => [
+        new Regex("^cache clear")
+    ];
+
+    public string HelpText => "Clear the cache";
+    public bool HideFromHelp => true;
+    public UserRight RequiredRight => UserRight.Admin;
+    
+    public async Task RunCommand(ChatBot botInstance, MessageModel message, UserDbModel user, GroupCollection arguments, CancellationToken ctx)
+    {
+        var cacheKeys = MemoryCache.Default.Select(kvp => kvp.Key).ToList();
+        foreach (var cacheKey in cacheKeys)
+        {
+            MemoryCache.Default.Remove(cacheKey);
+        }
+        botInstance.SendChatMessage("Cache wiped", true);
+    }
+}