♻️ 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/astro/dist/transitions/swap-functions.d.ts

@@ -1,20 +0,0 @@
-export type SavedFocus = {
-    activeElement: HTMLElement | null;
-    start?: number | null;
-    end?: number | null;
-};
-export declare function detectScriptExecuted(script: HTMLScriptElement): boolean;
-export declare function deselectScripts(doc: Document): void;
-export declare function swapRootAttributes(newDoc: Document): void;
-export declare function swapHeadElements(doc: Document): void;
-export declare function swapBodyElement(newElement: Element, oldElement: Element): void;
-export declare const saveFocus: () => (() => void);
-export declare const restoreFocus: ({ activeElement, start, end }: SavedFocus) => void;
-export declare const swapFunctions: {
-    deselectScripts: typeof deselectScripts;
-    swapRootAttributes: typeof swapRootAttributes;
-    swapHeadElements: typeof swapHeadElements;
-    swapBodyElement: typeof swapBodyElement;
-    saveFocus: () => (() => void);
-};
-export declare const swap: (doc: Document) => void;