♻️ 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/metadata.d.ts

@@ -1,10 +0,0 @@
-import type { ImageMetadata } from '../types.js';
-/**
- * Extracts image metadata such as dimensions, format, and orientation from the provided image data.
- *
- * @param {Uint8Array} data - The binary data of the image.
- * @param {string} [src] - The source path or URL of the image, used for error messages. Optional.
- * @return {Promise<Omit<ImageMetadata, 'src' | 'fsPath'>>} A promise that resolves with the extracted metadata, excluding `src` and `fsPath`.
- * @throws {AstroError} Throws an error if the image metadata cannot be extracted.
- */
-export declare function imageMetadata(data: Uint8Array, src?: string): Promise<Omit<ImageMetadata, 'src' | 'fsPath'>>;