♻️ 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

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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/assets/utils/remoteProbe.d.ts

@@ -1,13 +0,0 @@
-import type { AstroConfig } from '../../types/public/config.js';
-import type { ImageMetadata } from '../types.js';
-type RemoteImageConfig = Pick<AstroConfig['image'], 'domains' | 'remotePatterns'>;
-/**
- * Infers the dimensions of a remote image by streaming its data and analyzing it progressively until sufficient metadata is available.
- *
- * @param {string} url - The URL of the remote image from which to infer size metadata.
- * @param {RemoteImageConfig} [imageConfig] - Optional image config used to validate remote allowlists.
- * @return {Promise<Omit<ImageMetadata, 'src' | 'fsPath'>>} Returns a promise that resolves to an object containing the image dimensions metadata excluding `src` and `fsPath`.
- * @throws {AstroError} Thrown when the fetching fails or metadata cannot be extracted.
- */
-export declare function inferRemoteSize(url: string, imageConfig?: RemoteImageConfig): Promise<Omit<ImageMetadata, 'src' | 'fsPath'>>;
-export {};