Commandsgpt

* Fix 1 bug in IF command
* Improve IF command description

* Fix util subpackage

* Add CONCATENATE_STRINGS essential command.

* Fix README.md

* Create Recognizers classes
* Complex, Sequential and Single recognizers
* Update requirements.txt

* Change structure to JSON-Lines
* Add CALCULATE command
* Inject data only into command arguments (not rebuild the entire graph)
* Unescape strings in commands arguments before creating the commands
* Add save graph as file
* Improve instruction recognition system message
* Remove StaticVar

**Full Changelog**: https://github.com/AlexisAndradeDev/CommandsGPT/compare/v1.2.2...v1.3.0