♻️ 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/prismjs/components/prism-ebnf.js

@@ -1,22 +0,0 @@
-Prism.languages.ebnf = {
-	'comment': /\(\*[\s\S]*?\*\)/,
-	'string': {
-		pattern: /"[^"\r\n]*"|'[^'\r\n]*'/,
-		greedy: true
-	},
-	'special': {
-		pattern: /\?[^?\r\n]*\?/,
-		greedy: true,
-		alias: 'class-name'
-	},
-
-	'definition': {
-		pattern: /^([\t ]*)[a-z]\w*(?:[ \t]+[a-z]\w*)*(?=\s*=)/im,
-		lookbehind: true,
-		alias: ['rule', 'keyword']
-	},
-	'rule': /\b[a-z]\w*(?:[ \t]+[a-z]\w*)*\b/i,
-
-	'punctuation': /\([:/]|[:/]\)|[.,;()[\]{}]/,
-	'operator': /[-=|*/!]/
-};