* feat(tool): switch create-readme support link to /contacts
* feat(scripts): warn on deprecated support link in readme check
* feat(templates): switch cookiecutter readme support links to contacts
* docs(skill): drop removed validate mode from repo-readme docs
* test(status): cover contacts link warn/fail/ok cases
* fix(ci): shorten lines to satisfy ruff
* fix(ci): apply ruff format
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Co-authored-by: opencode-agent <agent@opencode.local>