♻️ Restructure: Move Astro to repository root

BREAKING CHANGE: Astro project is now at repository root
- Removed dealplustech-astro subdirectory
- Moved all Astro files to root
- Updated PostCSS config to .cjs
- Removed old Next.js files

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✅ Ready for Easypanel deployment (no root dir needed)

Migration path:
- Old structure: /dealplustech-astro/
- New structure: / (root)

dealplustech-astro/node_modules/js-yaml/lib/schema/failsafe.js

@@ -1,17 +0,0 @@
-// Standard YAML's Failsafe schema.
-// http://www.yaml.org/spec/1.2/spec.html#id2802346
-
-
-'use strict';
-
-
-var Schema = require('../schema');
-
-
-module.exports = new Schema({
-  explicit: [
-    require('../type/str'),
-    require('../type/seq'),
-    require('../type/map')
-  ]
-});