move commands under ast

alib2cli/src/ast/Command.h

alib2cli/src/ast/command/AlgorithmsIntrospectionCommand.h

alib2cli/src/ast/command/BindingsIntrospectionCommand.h

alib2cli/src/ast/command/CastsIntrospectionCommand.h

alib2cli/src/ast/command/CommandList.h

alib2cli/src/ast/command/CommandResult.h

alib2cli/src/ast/command/DataTypesIntrospectionCommand.h

alib2cli/src/ast/command/EOTCommand.h

alib2cli/src/ast/command/ExecuteCommand.h

alib2cli/src/ast/command/HelpCommand.h

alib2cli/src/ast/command/LoadCommand.h

alib2cli/src/ast/command/OverloadsIntrospectionCommand.h

alib2cli/src/ast/command/QuitCommand.h

alib2cli/src/ast/command/SetCommand.h

alib2cli/src/ast/command/UnloadCommand.h

alib2cli/src/ast/command/VariablesIntrospectionCommand.h

alib2cli/src/environment/Environment.h

alib2cli/src/parser/Parser.cpp

alib2cli/src/parser/Parser.h