Add a blocking 'css-colors' mode to theme-lint that flags any hardcoded
colour in source .css under editor/src (primitives.css + generated
output.css exempt). File list is sourced from 'git ls-files' rather than a
directory walk, so there's no readdir→readFile path; comments and structural
black/white/transparent are ignored. Wired into 'task frontend:lint:colors'.
Update theme README + script header for the expanded palette and the now
app-wide enforcement.
EthanHealy01
544a1f02eb