Restructor the code into different classes instead of extending

core/command/app/checkcode.php

lib/private/app/codechecker/codechecker.php

lib/private/app/codechecker/deprecationlist.php

lib/private/app/codechecker/ichecklist.php

lib/private/app/codechecker/nodevisitor.php

lib/private/app/codechecker/privatelist.php

lib/private/app/deprecationcodechecker.php

tests/lib/app/codechecker/codecheckertest.php

tests/lib/app/codechecker/deprecationlisttest.php

tests/lib/app/codechecker/mock/testlist.php

tests/lib/app/codechecker/nodevisitortest.php