♻️ 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-eiffel.js

@@ -1,34 +0,0 @@
-Prism.languages.eiffel = {
-	'comment': /--.*/,
-	'string': [
-		// Aligned-verbatim-strings
-		{
-			pattern: /"([^[]*)\[[\s\S]*?\]\1"/,
-			greedy: true
-		},
-		// Non-aligned-verbatim-strings
-		{
-			pattern: /"([^{]*)\{[\s\S]*?\}\1"/,
-			greedy: true
-		},
-		// Single-line string
-		{
-			pattern: /"(?:%(?:(?!\n)\s)*\n\s*%|%\S|[^%"\r\n])*"/,
-			greedy: true
-		}
-	],
-	// normal char | special char | char code
-	'char': /'(?:%.|[^%'\r\n])+'/,
-	'keyword': /\b(?:across|agent|alias|all|and|as|assign|attached|attribute|check|class|convert|create|Current|debug|deferred|detachable|do|else|elseif|end|ensure|expanded|export|external|feature|from|frozen|if|implies|inherit|inspect|invariant|like|local|loop|not|note|obsolete|old|once|or|Precursor|redefine|rename|require|rescue|Result|retry|select|separate|some|then|undefine|until|variant|Void|when|xor)\b/i,
-	'boolean': /\b(?:False|True)\b/i,
-	// Convention: class-names are always all upper-case characters
-	'class-name': /\b[A-Z][\dA-Z_]*\b/,
-	'number': [
-		// hexa | octal | bin
-		/\b0[xcb][\da-f](?:_*[\da-f])*\b/i,
-		// Decimal
-		/(?:\b\d(?:_*\d)*)?\.(?:(?:\d(?:_*\d)*)?e[+-]?)?\d(?:_*\d)*\b|\b\d(?:_*\d)*\b\.?/i
-	],
-	'punctuation': /:=|<<|>>|\(\||\|\)|->|\.(?=\w)|[{}[\];(),:?]/,
-	'operator': /\\\\|\|\.\.\||\.\.|\/[~\/=]?|[><]=?|[-+*^=~]/
-};