feat: extract cms from mp/cms — initial libreshop/cms

Source moved verbatim from mp/cms/ on 2026-04-29; mp was the first
concrete adapter consuming the libreshop toolkit. Builds and publishes
git.librete.ch/libreshop/cms on every main / v* push via the standard
.gitea/workflows/build.yml shared across libreshop components.

config/middlewares.ts

@@ -0,0 +1,12 @@
+export default [
+	"strapi::errors",
+	"strapi::security",
+	"strapi::cors",
+	// 'strapi::poweredBy',
+	"strapi::logger",
+	"strapi::query",
+	"strapi::body",
+	"strapi::session",
+	"strapi::favicon",
+	"strapi::public"
+];