namingng.py was only usable in standalone mode, but now supports CLI
mode, i.e. with cppcheck --addon=namingng. It uses the generic reporting
provided by cppcheckdata.reportError(). All output other than reported
errors is suppressed.
A local function reportNamingError() is implemented to call through to
cppcheckdata.reportError(), filling in common defaults.
The collection of errors and the --verify feature are removed, including
related workflow and a test file. These are replaced by a unit test.
thingsconnected