* Add new 'disable standard units' directive and it's processing
* Refactor InitializeNewUnit function
* Improve disable standard units directive checks
* Add null check in programs.cs to avoid error
* Rename error related to disable standard units directive
* Add referencing standard net libraries
* Add checks for duplicates when injecting references
* Unify directive errors
* Add new quotesAreSpecialSymbols field to DirectifeInfo
* Rewrite directive parsing and checks
* Delete R+ directive from pascal tests
* Extract base classes from ParserTools (local) and GPPGParserHelper
* Fix string resources error
* Extract base class for unexpected token error
* Update ParserTools project file
* Add comments for compiler directives usages in compiler
* Add directives checks
* Move string constants to new project
* Implement scalable directives checks
* Remove known directives from compiler
* Fix PABCSystem namespace error
* Allow region and endregion with no params
* Allow parameters to endif directive
* Delete directive parameters extension checks
* Replace error with warning for uknown directive case
* Fix generate native code (semantic rule) assigning
* Improve error messages for directives
* Rename RunParseThread to SwitchOnIntellisence
Для отладки может требоваться отключение Intellisence на уровне кода. Для понятности метод назван SwitchOnIntellisence.
* Resolve merge conflicts
* Add new compiler errors for unsupported target framework and output file type
* Add documentation to directives checks
* Fix directives check loop
