Rename language::DataType to ASTNodeDataType

src/language/ASTNode.hpp

src/language/ASTNodeAffectationExpressionBuilder.cpp

src/language/ASTNodeBinaryOperatorExpressionBuilder.cpp

src/language/ASTNodeDataType.cpp

src/language/ASTNodeDataType.hpp

src/language/ASTNodeExpressionBuilder.cpp

src/language/ASTNodeIncDecExpressionBuilder.cpp

src/language/ASTNodeUnaryOperatorExpressionBuilder.cpp

src/language/ASTPrinter.cpp

src/language/ASTPrinter.hpp

src/language/PugsParser.cpp

src/language/SymbolTable.hpp

tests/test_ASTBuilder.cpp