♻️ 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/tsv.mjs

@@ -1,5 +0,0 @@
-const lang = Object.freeze(JSON.parse("{\"displayName\":\"TSV\",\"fileTypes\":[\"tsv\",\"tab\"],\"name\":\"tsv\",\"patterns\":[{\"captures\":{\"1\":{\"name\":\"rainbow1\"},\"2\":{\"name\":\"keyword.rainbow2\"},\"3\":{\"name\":\"entity.name.function.rainbow3\"},\"4\":{\"name\":\"comment.rainbow4\"},\"5\":{\"name\":\"string.rainbow5\"},\"6\":{\"name\":\"variable.parameter.rainbow6\"},\"7\":{\"name\":\"constant.numeric.rainbow7\"},\"8\":{\"name\":\"entity.name.type.rainbow8\"},\"9\":{\"name\":\"markup.bold.rainbow9\"},\"10\":{\"name\":\"invalid.rainbow10\"}},\"match\":\"([^\\\\t]*\\\\t?)([^\\\\t]*\\\\t?)([^\\\\t]*\\\\t?)([^\\\\t]*\\\\t?)([^\\\\t]*\\\\t?)([^\\\\t]*\\\\t?)([^\\\\t]*\\\\t?)([^\\\\t]*\\\\t?)([^\\\\t]*\\\\t?)([^\\\\t]*\\\\t?)\",\"name\":\"rainbowgroup\"}],\"scopeName\":\"text.tsv\"}"))
-
-export default [
-lang
-]