♻️ 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
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✅ 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/@astrojs/compiler/dist/browser/index.d.ts

@@ -1,11 +0,0 @@
-import { transform as transform$1, parse as parse$1, convertToTSX as convertToTSX$1, teardown as teardown$1, initialize as initialize$1 } from '../shared/types.js';
-import '../shared/ast.js';
-import '../shared/diagnostics.js';
-
-declare const transform: typeof transform$1;
-declare const parse: typeof parse$1;
-declare const convertToTSX: typeof convertToTSX$1;
-declare const teardown: typeof teardown$1;
-declare const initialize: typeof initialize$1;
-
-export { convertToTSX, initialize, parse, teardown, transform };