♻️ 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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✅ 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/space-separated-tokens/index.js

@@ -1,24 +0,0 @@
-/**
- * Parse space-separated tokens to an array of strings.
- *
- * @param {string} value
- *   Space-separated tokens.
- * @returns {Array<string>}
- *   List of tokens.
- */
-export function parse(value) {
-  const input = String(value || '').trim()
-  return input ? input.split(/[ \t\n\r\f]+/g) : []
-}
-
-/**
- * Serialize an array of strings as space separated-tokens.
- *
- * @param {Array<string|number>} values
- *   List of tokens.
- * @returns {string}
- *   Space-separated tokens.
- */
-export function stringify(values) {
-  return values.join(' ').trim()
-}