♻️ 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.js

@@ -1,33 +0,0 @@
-import { createHeadAndContent, renderTemplate, renderToString } from "./astro/index.js";
-import { chunkToByteArray, chunkToString, Fragment, Renderer } from "./common.js";
-import { renderComponent, renderComponentToString } from "./component.js";
-import { renderHTMLElement } from "./dom.js";
-import { maybeRenderHead, renderHead } from "./head.js";
-import { renderPage } from "./page.js";
-import { renderScript } from "./script.js";
-import { renderSlot, renderSlotToString } from "./slot.js";
-import { renderScriptElement, renderUniqueStylesheet } from "./tags.js";
-import { addAttribute, defineScriptVars, voidElementNames } from "./util.js";
-export {
-  Fragment,
-  Renderer,
-  addAttribute,
-  chunkToByteArray,
-  chunkToString,
-  createHeadAndContent,
-  defineScriptVars,
-  maybeRenderHead,
-  renderComponent,
-  renderComponentToString,
-  renderHTMLElement,
-  renderHead,
-  renderPage,
-  renderScript,
-  renderScriptElement,
-  renderSlot,
-  renderSlotToString,
-  renderTemplate,
-  renderToString,
-  renderUniqueStylesheet,
-  voidElementNames
-};