♻️ 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/regex/dist/esm/atomic.d.ts

@@ -1,18 +0,0 @@
-/**
-Apply transformations for atomic groups: `(?>…)`.
-@param {string} expression
-@param {PluginData} [data]
-@returns {Required<PluginResult>}
-*/
-export function atomic(expression: string, data?: PluginData): Required<PluginResult>;
-/**
-Transform posessive quantifiers into atomic groups. The posessessive quantifiers are:
-`?+`, `*+`, `++`, `{N}+`, `{N,}+`, `{N,N}+`.
-This follows Java, PCRE, Perl, and Python.
-Possessive quantifiers in Oniguruma and Onigmo are only: `?+`, `*+`, `++`.
-@param {string} expression
-@returns {PluginResult}
-*/
-export function possessive(expression: string): PluginResult;
-import type { PluginData } from './regex.js';
-import type { PluginResult } from './regex.js';