Add ASTNodeExpressionBuilder class

src/language/ASTNodeAffectationExpressionBuilder.cpp

src/language/ASTNodeAffectationExpressionBuilder.hpp

src/language/ASTNodeBinaryOperatorExpressionBuilder.cpp

src/language/ASTNodeBinaryOperatorExpressionBuilder.hpp

src/language/ASTNodeExpressionBuilder.cpp

src/language/ASTNodeExpressionBuilder.hpp

src/language/ASTNodeIncDecExpressionBuilder.cpp

src/language/ASTNodeIncDecExpressionBuilder.hpp

src/language/ASTNodeUnaryOperatorExpressionBuilder.cpp

src/language/ASTNodeUnaryOperatorExpressionBuilder.hpp

src/language/PugsParser.cpp