♻️ 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
✅ Cookie consent banner included
✅ 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/plugins/toolbar/prism-toolbar.css

@@ -1,65 +0,0 @@
-div.code-toolbar {
-	position: relative;
-}
-
-div.code-toolbar > .toolbar {
-	position: absolute;
-	z-index: 10;
-	top: .3em;
-	right: .2em;
-	transition: opacity 0.3s ease-in-out;
-	opacity: 0;
-}
-
-div.code-toolbar:hover > .toolbar {
-	opacity: 1;
-}
-
-/* Separate line b/c rules are thrown out if selector is invalid.
-   IE11 and old Edge versions don't support :focus-within. */
-div.code-toolbar:focus-within > .toolbar {
-	opacity: 1;
-}
-
-div.code-toolbar > .toolbar > .toolbar-item {
-	display: inline-block;
-}
-
-div.code-toolbar > .toolbar > .toolbar-item > a {
-	cursor: pointer;
-}
-
-div.code-toolbar > .toolbar > .toolbar-item > button {
-	background: none;
-	border: 0;
-	color: inherit;
-	font: inherit;
-	line-height: normal;
-	overflow: visible;
-	padding: 0;
-	-webkit-user-select: none; /* for button */
-	-moz-user-select: none;
-	-ms-user-select: none;
-}
-
-div.code-toolbar > .toolbar > .toolbar-item > a,
-div.code-toolbar > .toolbar > .toolbar-item > button,
-div.code-toolbar > .toolbar > .toolbar-item > span {
-	color: #bbb;
-	font-size: .8em;
-	padding: 0 .5em;
-	background: #f5f2f0;
-	background: rgba(224, 224, 224, 0.2);
-	box-shadow: 0 2px 0 0 rgba(0,0,0,0.2);
-	border-radius: .5em;
-}
-
-div.code-toolbar > .toolbar > .toolbar-item > a:hover,
-div.code-toolbar > .toolbar > .toolbar-item > a:focus,
-div.code-toolbar > .toolbar > .toolbar-item > button:hover,
-div.code-toolbar > .toolbar > .toolbar-item > button:focus,
-div.code-toolbar > .toolbar > .toolbar-item > span:hover,
-div.code-toolbar > .toolbar > .toolbar-item > span:focus {
-	color: inherit;
-	text-decoration: none;
-}