Fixed missing proper exception in AIProvider

src/Server/Exceptions/GeneralExceptions.cs

@@ -0,0 +1,7 @@
+namespace Server.Exceptions;
+
+public class ProbMethodNotFoundException(string probMethod) : Exception($"Unknown probMethod name {probMethod}") { }
+
+public class SimilarityMethodNotFoundException(string similarityMethod) : Exception($"Unknown similarityMethod name \"{similarityMethod}\"") { }
+
+public class JSONPathSelectionException(string path, string testedContent) : Exception($"Unable to select tokens using JSONPath {path} for string: {testedContent}.") { }