Four repos (sm-summercms-app, vue-summercms-app, sm-summercms-plugin,
sm-newsletter-plugin), Nuxt 4 static site in EN and PL embedded in the
binary, double opt-in signup with honeypot, consent and neutral
responses, and a standalone sending-ready subscribers table.
Adds Phase 11.2 after 11.1: the sm-summercms-app root with a
vue-summercms-app website, an sm-newsletter-plugin stub ported from
Golem15.Newsletter with double opt-in signup, and the 11.1 docs served
at /docs. Records the sm- repo naming convention.