♻️ 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
✅ Cookie consent banner included
✅ 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/@shikijs/langs/dist/jinja-html.mjs

@@ -1,8 +0,0 @@
-import html from './html.mjs'
-
-const lang = Object.freeze(JSON.parse("{\"displayName\":\"jinja-html\",\"firstLineMatch\":\"^\\\\{% extends [\\\"'][^\\\"']+[\\\"'] %}\",\"foldingStartMarker\":\"(<(?i:(head|table|tr|div|style|script|ul|ol|form|dl))\\\\b.*?>|\\\\{%\\\\s*(block|filter|for|if|macro|raw))\",\"foldingStopMarker\":\"(</(?i:(head|table|tr|div|style|script|ul|ol|form|dl))\\\\b.*?>|\\\\{%\\\\s*(end(?:block|filter|for|if|macro|raw))\\\\s*%})\",\"name\":\"jinja-html\",\"patterns\":[{\"include\":\"source.jinja\"},{\"include\":\"text.html.basic\"}],\"scopeName\":\"text.html.jinja\",\"embeddedLangs\":[\"html\"]}"))
-
-export default [
-...html,
-lang
-]