♻️ 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/astro/dist/jsx-runtime/index.d.ts

@@ -1,12 +0,0 @@
-import { Fragment, Renderer } from '../runtime/server/index.js';
-declare const AstroJSX = "astro:jsx";
-export interface AstroVNode {
-    [Renderer]: string;
-    [AstroJSX]: boolean;
-    type: string | ((...args: any) => any);
-    props: Record<string | symbol, any>;
-}
-export declare function isVNode(vnode: any): vnode is AstroVNode;
-export declare function transformSlots(vnode: AstroVNode): AstroVNode | undefined;
-declare function createVNode(type: any, props?: Record<string, any>, key?: string | number): AstroVNode;
-export { AstroJSX, Fragment, createVNode as jsx, createVNode as jsxDEV, createVNode as jsxs };