♻️ 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

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✅ Ready for Easypanel deployment (no root dir needed)

Migration path:
- Old structure: /dealplustech-astro/
- New structure: / (root)

dealplustech-astro/node_modules/astro/dist/virtual-modules/container.d.ts

@@ -1,17 +0,0 @@
-import type { AstroRenderer } from '../types/public/integrations.js';
-import type { SSRLoadedRenderer } from '../types/public/internal.js';
-/**
- * Use this function to provide renderers to the `AstroContainer`:
- *
- * ```js
- * import { getContainerRenderer } from "@astrojs/react";
- * import { experimental_AstroContainer as AstroContainer } from "astro/container";
- * import { loadRenderers } from "astro:container"; // use this only when using vite/vitest
- *
- * const renderers = await loadRenderers([ getContainerRenderer ]);
- * const container = await AstroContainer.create({ renderers });
- *
- * ```
- * @param renderers
- */
-export declare function loadRenderers(renderers: AstroRenderer[]): Promise<SSRLoadedRenderer[]>;