♻️ 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/json.js

@@ -1,19 +0,0 @@
-// Standard YAML's JSON schema.
-// http://www.yaml.org/spec/1.2/spec.html#id2803231
-//
-// NOTE: JS-YAML does not support schema-specific tag resolution restrictions.
-// So, this schema is not such strict as defined in the YAML specification.
-// It allows numbers in binary notaion, use `Null` and `NULL` as `null`, etc.
-
-
-'use strict';
-
-
-module.exports = require('./failsafe').extend({
-  implicit: [
-    require('../type/null'),
-    require('../type/bool'),
-    require('../type/int'),
-    require('../type/float')
-  ]
-});