♻️ 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/render/index.d.ts

@@ -1,12 +0,0 @@
-export type { AstroComponentFactory, AstroComponentInstance } from './astro/index.js';
-export { createHeadAndContent, renderTemplate, renderToString } from './astro/index.js';
-export { chunkToByteArray, chunkToString, Fragment, Renderer } from './common.js';
-export { renderComponent, renderComponentToString } from './component.js';
-export { renderHTMLElement } from './dom.js';
-export { maybeRenderHead, renderHead } from './head.js';
-export type { RenderInstruction } from './instruction.js';
-export { renderPage } from './page.js';
-export { renderScript } from './script.js';
-export { type ComponentSlots, renderSlot, renderSlotToString } from './slot.js';
-export { renderScriptElement, renderUniqueStylesheet } from './tags.js';
-export { addAttribute, defineScriptVars, voidElementNames } from './util.js';