Recommendation is to avoid using the year nomenclature as this
information is already encoded in the git repo. Avoids needing to
repeatly update.
Also updates AUTHORS.txt from current repo with contributor names
Adds REPORTER::HasMessageOfSeverity for WX_STRING_REPORTER,
which allows us to show simulation warnings and fail only if there's errors.
Also fixes a crash when SPICE_GENERATOR_KIBIS throws an IO_ERROR.
Fixes https://gitlab.com/kicad/code/kicad/-/issues/18143