Squashed 'cms/core/' changes from f709b5d..ac7538f

ac7538f chore: gitignore admin/dist build output
86f9f57 core: stage 7 — auth provider (config.auth: supabase | local), DB-less core

git-subtree-dir: cms/core
git-subtree-split: ac7538fa0c2c883e29fe67c8d8c15c5f40fa2230

examples/kgva.config.js

@@ -2,6 +2,7 @@
 // No dialog plugin; a portfolio-shaped content model.
 export default {
   site: 'kgva',
+  auth: 'local', // DB-less: file-based users + self-signed JWTs (no Supabase/Postgres)
   admins: ['karim@gabrielevarano.ch'],
   plugins: [],