♻️ 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
✅ Cookie consent banner included
✅ Privacy/Terms links in footer
✅ Ready for Easypanel deployment (no root dir needed)

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

dealplustech-astro/node_modules/postcss/lib/result.js

@@ -1,42 +0,0 @@
-'use strict'
-
-let Warning = require('./warning')
-
-class Result {
-  get content() {
-    return this.css
-  }
-
-  constructor(processor, root, opts) {
-    this.processor = processor
-    this.messages = []
-    this.root = root
-    this.opts = opts
-    this.css = ''
-    this.map = undefined
-  }
-
-  toString() {
-    return this.css
-  }
-
-  warn(text, opts = {}) {
-    if (!opts.plugin) {
-      if (this.lastPlugin && this.lastPlugin.postcssPlugin) {
-        opts.plugin = this.lastPlugin.postcssPlugin
-      }
-    }
-
-    let warning = new Warning(text, opts)
-    this.messages.push(warning)
-
-    return warning
-  }
-
-  warnings() {
-    return this.messages.filter(i => i.type === 'warning')
-  }
-}
-
-module.exports = Result
-Result.default = Result