♻️ 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/astro/dist/runtime/server/index.d.ts

@@ -1,14 +0,0 @@
-export { createComponent } from './astro-component.js';
-export { createAstro } from './astro-global.js';
-export { renderEndpoint } from './endpoint.js';
-export { escapeHTML, HTMLBytes, HTMLString, isHTMLString, markHTMLString, unescapeHTML, } from './escape.js';
-export { renderJSX } from './jsx.js';
-export type { AstroComponentFactory, AstroComponentInstance, ComponentSlots, RenderInstruction, } from './render/index.js';
-export { addAttribute, createHeadAndContent, defineScriptVars, Fragment, maybeRenderHead, Renderer as Renderer, renderComponent, renderHead, renderHTMLElement, renderPage, renderScript, renderScriptElement, renderSlot, renderSlotToString, renderTemplate as render, renderTemplate, renderToString, renderUniqueStylesheet, voidElementNames, } from './render/index.js';
-export type { ServerIslandComponent } from './render/server-islands.js';
-export { createTransitionScope, renderTransition } from './transition.js';
-export declare function mergeSlots(...slotted: unknown[]): Record<string, () => any>;
-export declare function spreadAttributes(values?: Record<any, any>, _name?: string, { class: scopedClassName }?: {
-    class?: string;
-}): any;
-export declare function defineStyleVars(defs: Record<any, any> | Record<any, any>[]): any;