♻️ 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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✅ Ready for Easypanel deployment (no root dir needed)

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

dealplustech-astro/node_modules/prismjs/components/prism-editorconfig.js

@@ -1,26 +0,0 @@
-Prism.languages.editorconfig = {
-	// https://editorconfig-specification.readthedocs.io
-	'comment': /[;#].*/,
-	'section': {
-		pattern: /(^[ \t]*)\[.+\]/m,
-		lookbehind: true,
-		alias: 'selector',
-		inside: {
-			'regex': /\\\\[\[\]{},!?.*]/, // Escape special characters with '\\'
-			'operator': /[!?]|\.\.|\*{1,2}/,
-			'punctuation': /[\[\]{},]/
-		}
-	},
-	'key': {
-		pattern: /(^[ \t]*)[^\s=]+(?=[ \t]*=)/m,
-		lookbehind: true,
-		alias: 'attr-name'
-	},
-	'value': {
-		pattern: /=.*/,
-		alias: 'attr-value',
-		inside: {
-			'punctuation': /^=/
-		}
-	}
-};