The offline analysis CLI belongs next to its Rugnux library. Move the source and
the ADD_EXECUTABLE(rugnux ...) target (plus the Windows wingetopt link) into
rugnux/CMakeLists.txt; the ../reader, ../common, ../image_analysis includes are
unchanged (both dirs sit one level under the root) and ../rugnux/Rugnux.h becomes
a local Rugnux.h. rugnux/ is added before tools/ in every build config, so
viewer-only and Windows packages still get the CLI.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>