♻️ 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/oniguruma-to-es/dist/esm/subclass.d.ts

@@ -1,39 +0,0 @@
-export type EmulatedRegExpOptions = {
-    hiddenCaptures?: Array<number>;
-    lazyCompile?: boolean;
-    strategy?: string | null;
-    transfers?: Array<[number, Array<number>]>;
-};
-/**
-@typedef {{
-  hiddenCaptures?: Array<number>;
-  lazyCompile?: boolean;
-  strategy?: string | null;
-  transfers?: Array<[number, Array<number>]>;
-}} EmulatedRegExpOptions
-*/
-/**
-Works the same as JavaScript's native `RegExp` constructor in all contexts, but can be given
-results from `toRegExpDetails` to produce the same result as `toRegExp`.
-*/
-export class EmulatedRegExp extends RegExp {
-    /**
-     @overload
-     @param {string} pattern
-     @param {string} [flags]
-     @param {EmulatedRegExpOptions} [options]
-     */
-    constructor(pattern: string, flags?: string, options?: EmulatedRegExpOptions);
-    /**
-     @overload
-     @param {EmulatedRegExp} pattern
-     @param {string} [flags]
-     */
-    constructor(pattern: EmulatedRegExp, flags?: string);
-    /**
-    Can be used to serialize the instance.
-    @type {EmulatedRegExpOptions}
-    */
-    rawOptions: EmulatedRegExpOptions;
-    #private;
-}