♻️ 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/astro/dist/vite-plugin-astro-server/request.d.ts

@@ -1,14 +0,0 @@
-import type http from 'node:http';
-import type { RoutesList } from '../types/astro.js';
-import type { DevServerController } from './controller.js';
-import type { DevPipeline } from './pipeline.js';
-type HandleRequest = {
-    pipeline: DevPipeline;
-    routesList: RoutesList;
-    controller: DevServerController;
-    incomingRequest: http.IncomingMessage;
-    incomingResponse: http.ServerResponse;
-};
-/** The main logic to route dev server requests to pages in Astro. */
-export declare function handleRequest({ pipeline, routesList, controller, incomingRequest, incomingResponse, }: HandleRequest): Promise<void>;
-export {};