* Migrate from HashTable to Dictionary<string, string> (StandartDirectories variable)
* Add check to register files for parsing only if they have supported extension
* Delete legacy code in CodeCompletion.cs
* Delete unnecessary fields in CodeCompletionController
* Refactor compiling dependencies code in DomSyntaxTreeVisitor
* Fix AddStandardNetNamespacesToUserScope check
* Comment out uses *some type* support in Intellisense
* Delete unused SemanticOptions in DomSyntaxTreeVisitor
* Comment out unused NamespaceTypeScope
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