♻️ 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/mdast-util-to-markdown/lib/handle/emphasis.d.ts

@@ -1,24 +0,0 @@
-/**
- * @param {Emphasis} node
- * @param {Parents | undefined} _
- * @param {State} state
- * @param {Info} info
- * @returns {string}
- */
-export function emphasis(node: Emphasis, _: Parents | undefined, state: State, info: Info): string;
-export namespace emphasis {
-    export { emphasisPeek as peek };
-}
-import type { Emphasis } from 'mdast';
-import type { Parents } from 'mdast';
-import type { State } from 'mdast-util-to-markdown';
-import type { Info } from 'mdast-util-to-markdown';
-/**
- * @param {Emphasis} _
- * @param {Parents | undefined} _1
- * @param {State} state
- * @returns {string}
- */
-declare function emphasisPeek(_: Emphasis, _1: Parents | undefined, state: State): string;
-export {};
-//# sourceMappingURL=emphasis.d.ts.map