Implemented indexer, cleanup

src/Indexer/Exceptions/IndexerExceptions.cs

@@ -0,0 +1,14 @@
+namespace Indexer.Exceptions;
+
+public class IndexerConfigurationException : Exception
+{
+    public IndexerConfigurationException()
+        : base("Configuration is incomplete or was set up incorrectly")
+    {
+    }
+
+    public IndexerConfigurationException(string message)
+        : base(message)
+    {
+    }
+}

src/Indexer/Exceptions/WorkerExceptions.cs

@@ -0,0 +1,18 @@
+namespace Indexer.Exceptions;
+
+public class UnknownScriptLanguageException : Exception
+{
+    public string? FileName { get; }
+
+    public UnknownScriptLanguageException(string? fileName = null)
+        : base("Unable to determine script language")
+    {
+        FileName = fileName;
+    }
+
+    public UnknownScriptLanguageException(string message, string? fileName = null)
+        : base(message)
+    {
+        FileName = fileName;
+    }
+}