♻️ 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/hast-util-raw/index.d.ts

@@ -1,43 +0,0 @@
-import type {VFile} from 'vfile'
-
-export {raw} from './lib/index.js'
-
-/**
- * Configuration.
- */
-export interface Options {
-  /**
-   * Corresponding virtual file representing the input document (optional).
-   */
-  file?: VFile | null | undefined
-
-  /**
-   * List of custom hast node types to pass through (as in, keep) (optional).
-   *
-   * If the passed through nodes have children, those children are expected to
-   * be hast again and will be handled.
-   */
-  passThrough?: Array<string> | null | undefined
-
-  /**
-   * Whether to disallow irregular tags in `raw` nodes according to GFM
-   * tagfilter
-   * (default: `false`).
-   *
-   * This affects the following tags,
-   * grouped by their kind:
-   *
-   * * `RAWTEXT`: `iframe`, `noembed`, `noframes`, `style`, `xmp`
-   * * `RCDATA`: `textarea`, `title`
-   * * `SCRIPT_DATA`: `script`
-   * * `PLAINTEXT`: `plaintext`
-   *
-   * When you know that you do not want authors to write these tags,
-   * you can enable this option to prevent their use from running amok.
-   *
-   * See:
-   * [*Disallowed Raw HTML* in
-   * `cmark-gfm`](https://github.github.com/gfm/#disallowed-raw-html-extension-).
-   */
-  tagfilter?: boolean | null | undefined
-}