Add Docker Registry AIO with Nuxt Token Auth and admin UI.

Compose brings up registry:3 plus a Prisma/SQLite Nuxt app for docker login, ACL management, and image browsing with shadcn-vue.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/server/api/auth/logout.post.ts

@@ -0,0 +1,4 @@
+export default defineEventHandler(async (event) => {
+  clearSessionCookie(event)
+  return { ok: true }
+})