♻️ 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/remark-stringify/lib/index.d.ts

@@ -1,26 +0,0 @@
-/**
- * Add support for serializing to markdown.
- *
- * @param {Readonly<Options> | null | undefined} [options]
- *   Configuration (optional).
- * @returns {undefined}
- *   Nothing.
- */
-export default function remarkStringify(options?: Readonly<Options> | null | undefined): undefined;
-export default class remarkStringify {
-    /**
-     * Add support for serializing to markdown.
-     *
-     * @param {Readonly<Options> | null | undefined} [options]
-     *   Configuration (optional).
-     * @returns {undefined}
-     *   Nothing.
-     */
-    constructor(options?: Readonly<Options> | null | undefined);
-    compiler: (tree: import("mdast").Root, file: import("vfile").VFile) => string;
-}
-export type Root = import('mdast').Root;
-export type ToMarkdownOptions = import('mdast-util-to-markdown').Options;
-export type Compiler = import('unified').Compiler<Root, string>;
-export type Processor = import('unified').Processor<undefined, undefined, undefined, Root, string>;
-export type Options = Omit<ToMarkdownOptions, 'extensions'>;

dealplustech-astro/node_modules/remark-stringify/lib/index.js

@@ -1,42 +0,0 @@
-/**
- * @typedef {import('mdast').Root} Root
- * @typedef {import('mdast-util-to-markdown').Options} ToMarkdownOptions
- * @typedef {import('unified').Compiler<Root, string>} Compiler
- * @typedef {import('unified').Processor<undefined, undefined, undefined, Root, string>} Processor
- */
-
-/**
- * @typedef {Omit<ToMarkdownOptions, 'extensions'>} Options
- */
-
-import {toMarkdown} from 'mdast-util-to-markdown'
-
-/**
- * Add support for serializing to markdown.
- *
- * @param {Readonly<Options> | null | undefined} [options]
- *   Configuration (optional).
- * @returns {undefined}
- *   Nothing.
- */
-export default function remarkStringify(options) {
-  /** @type {Processor} */
-  // @ts-expect-error: TS in JSDoc generates wrong types if `this` is typed regularly.
-  const self = this
-
-  self.compiler = compiler
-
-  /**
-   * @type {Compiler}
-   */
-  function compiler(tree) {
-    return toMarkdown(tree, {
-      ...self.data('settings'),
-      ...options,
-      // Note: this option is not in the readme.
-      // The goal is for it to be set by plugins on `data` instead of being
-      // passed by users.
-      extensions: self.data('toMarkdownExtensions') || []
-    })
-  }
-}