Update dialog_base implementation, assets and documentation

tests/NumericTextLocale.cs

@@ -0,0 +1,8 @@
+namespace Cthangover.Mods.Dialog.Tests
+{
+    using Cthangover.Core.Localization;
+    internal class NumericTextLocale : ILocalizationProvider
+    {
+        public string Get(string key)=>key=="mod_dialog_base_name"?"Received ${money} coins.":null;
+    }
+}