♻️ 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-bison.js

@@ -1,39 +0,0 @@
-Prism.languages.bison = Prism.languages.extend('c', {});
-
-Prism.languages.insertBefore('bison', 'comment', {
-	'bison': {
-		// This should match all the beginning of the file
-		// including the prologue(s), the bison declarations and
-		// the grammar rules.
-		pattern: /^(?:[^%]|%(?!%))*%%[\s\S]*?%%/,
-		inside: {
-			'c': {
-				// Allow for one level of nested braces
-				pattern: /%\{[\s\S]*?%\}|\{(?:\{[^}]*\}|[^{}])*\}/,
-				inside: {
-					'delimiter': {
-						pattern: /^%?\{|%?\}$/,
-						alias: 'punctuation'
-					},
-					'bison-variable': {
-						pattern: /[$@](?:<[^\s>]+>)?[\w$]+/,
-						alias: 'variable',
-						inside: {
-							'punctuation': /<|>/
-						}
-					},
-					rest: Prism.languages.c
-				}
-			},
-			'comment': Prism.languages.c.comment,
-			'string': Prism.languages.c.string,
-			'property': /\S+(?=:)/,
-			'keyword': /%\w+/,
-			'number': {
-				pattern: /(^|[^@])\b(?:0x[\da-f]+|\d+)/i,
-				lookbehind: true
-			},
-			'punctuation': /%[%?]|[|:;\[\]<>]/
-		}
-	}
-});