♻️ 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

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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/prismjs/components/prism-properties.js

@@ -1,13 +0,0 @@
-Prism.languages.properties = {
-	'comment': /^[ \t]*[#!].*$/m,
-	'value': {
-		pattern: /(^[ \t]*(?:\\(?:\r\n|[\s\S])|[^\\\s:=])+(?: *[=:] *(?! )| ))(?:\\(?:\r\n|[\s\S])|[^\\\r\n])+/m,
-		lookbehind: true,
-		alias: 'attr-value'
-	},
-	'key': {
-		pattern: /^[ \t]*(?:\\(?:\r\n|[\s\S])|[^\\\s:=])+(?= *[=:]| )/m,
-		alias: 'attr-name'
-	},
-	'punctuation': /[=:]/
-};