♻️ 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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✅ 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/util/safe.d.ts

@@ -1,29 +0,0 @@
-/**
- * Make a string safe for embedding in markdown constructs.
- *
- * In markdown, almost all punctuation characters can, in certain cases,
- * result in something.
- * Whether they do is highly subjective to where they happen and in what
- * they happen.
- *
- * To solve this, `mdast-util-to-markdown` tracks:
- *
- * * Characters before and after something;
- * * What “constructs” we are in.
- *
- * This information is then used by this function to escape or encode
- * special characters.
- *
- * @param {State} state
- *   Info passed around about the current state.
- * @param {string | null | undefined} input
- *   Raw value to make safe.
- * @param {SafeConfig} config
- *   Configuration.
- * @returns {string}
- *   Serialized markdown safe for embedding.
- */
-export function safe(state: State, input: string | null | undefined, config: SafeConfig): string;
-import type { State } from 'mdast-util-to-markdown';
-import type { SafeConfig } from 'mdast-util-to-markdown';
-//# sourceMappingURL=safe.d.ts.map