♻️ 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
✅ Cookie consent banner included
✅ 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/@astrojs/markdown-remark/dist/shiki.d.ts

@@ -1,43 +0,0 @@
-import type { Root } from 'hast';
-import { type HighlighterCoreOptions, type LanguageRegistration, type ShikiTransformer, type ThemeRegistration, type ThemeRegistrationRaw } from 'shiki';
-import type { ThemePresets } from './types.js';
-export interface ShikiHighlighter {
-    codeToHast(code: string, lang?: string, options?: ShikiHighlighterHighlightOptions): Promise<Root>;
-    codeToHtml(code: string, lang?: string, options?: ShikiHighlighterHighlightOptions): Promise<string>;
-}
-export interface CreateShikiHighlighterOptions {
-    langs?: LanguageRegistration[];
-    theme?: ThemePresets | ThemeRegistration | ThemeRegistrationRaw;
-    themes?: Record<string, ThemePresets | ThemeRegistration | ThemeRegistrationRaw>;
-    langAlias?: HighlighterCoreOptions['langAlias'];
-}
-export interface ShikiHighlighterHighlightOptions {
-    /**
-     * Generate inline code element only, without the pre element wrapper.
-     */
-    inline?: boolean;
-    /**
-     * Enable word wrapping.
-     * - true: enabled.
-     * - false: disabled.
-     * - null: All overflow styling removed. Code will overflow the element by default.
-     */
-    wrap?: boolean | null;
-    /**
-     * Chooses a theme from the "themes" option that you've defined as the default styling theme.
-     */
-    defaultColor?: 'light' | 'dark' | string | false;
-    /**
-     * Shiki transformers to customize the generated HTML by manipulating the hast tree.
-     */
-    transformers?: ShikiTransformer[];
-    /**
-     * Additional attributes to be added to the root code block element.
-     */
-    attributes?: Record<string, string>;
-    /**
-     * Raw `meta` information to be used by Shiki transformers.
-     */
-    meta?: string;
-}
-export declare function createShikiHighlighter({ langs, theme, themes, langAlias, }?: CreateShikiHighlighterOptions): Promise<ShikiHighlighter>;