fix board size, some fixes to auto cashout from cursor (#75)

* cursor fixes

cursor fixes

* Improve cashout condition validation

Refactor cashout condition to check for success and non-empty value.

* cursor

cursor

* Update BotServices.cs

* Update board size limit from 10 to 9

Update board size limit from 10 to 9
81 characters instead of 100
12 bytes per character per powershell, 
down from 1200 bytes to 972

* Implement message deletion for active games

Added logic to delete messages associated with active games.

KfChatDotNetBot/Services/BotServices.cs

@@ -1,4 +1,4 @@
-using System.Text.Json;
+using System.Text.Json;
 using Humanizer;
 using KfChatDotNetBot.Extensions;
 using KfChatDotNetBot.Models;