♻️ 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-roboconf.js

@@ -1,27 +0,0 @@
-Prism.languages.roboconf = {
-	'comment': /#.*/,
-	'keyword': {
-		'pattern': /(^|\s)(?:(?:external|import)\b|(?:facet|instance of)(?=[ \t]+[\w-]+[ \t]*\{))/,
-		lookbehind: true
-	},
-	'component': {
-		pattern: /[\w-]+(?=[ \t]*\{)/,
-		alias: 'variable'
-	},
-	'property': /[\w.-]+(?=[ \t]*:)/,
-	'value': {
-		pattern: /(=[ \t]*(?![ \t]))[^,;]+/,
-		lookbehind: true,
-		alias: 'attr-value'
-	},
-	'optional': {
-		pattern: /\(optional\)/,
-		alias: 'builtin'
-	},
-	'wildcard': {
-		pattern: /(\.)\*/,
-		lookbehind: true,
-		alias: 'operator'
-	},
-	'punctuation': /[{},.;:=]/
-};