♻️ 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/cli/build/index.js

@@ -1,33 +0,0 @@
-import _build from "../../core/build/index.js";
-import { printHelp } from "../../core/messages.js";
-import { flagsToAstroInlineConfig } from "../flags.js";
-async function build({ flags }) {
-  if (flags?.help || flags?.h) {
-    printHelp({
-      commandName: "astro build",
-      usage: "[...flags]",
-      tables: {
-        Flags: [
-          ["--outDir <directory>", `Specify the output directory for the build.`],
-          ["--mode", `Specify the mode of the project. Defaults to "production".`],
-          [
-            "--devOutput",
-            "Output a development-based build similar to code transformed in `astro dev`."
-          ],
-          [
-            "--force",
-            "Clear the content layer and content collection cache, forcing a full rebuild."
-          ],
-          ["--help (-h)", "See all available flags."]
-        ]
-      },
-      description: `Builds your site for deployment.`
-    });
-    return;
-  }
-  const inlineConfig = flagsToAstroInlineConfig(flags);
-  await _build(inlineConfig, { devOutput: !!flags.devOutput });
-}
-export {
-  build
-};