♻️ 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

✅ 11 pages built successfully
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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/semver/ranges/valid.js

@@ -1,13 +0,0 @@
-'use strict'
-
-const Range = require('../classes/range')
-const validRange = (range, options) => {
-  try {
-    // Return '*' instead of '' so that truthiness works.
-    // This will throw if it's invalid anyway
-    return new Range(range, options).range || '*'
-  } catch (er) {
-    return null
-  }
-}
-module.exports = validRange