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>

.gitignore

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+node_modules/
+.nuxt/
+.output/
+.data/
+dist/
+.env
+certs/*.crt
+certs/*.key
+certs/*.pem
+!certs/.gitkeep
+data/
+*.db
+*.db-journal
+.DS_Store
+app/data/
+app/.env
+app/node_modules/
+app/.nuxt/
+app/.output/