♻️ 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/shellsession.mjs

@@ -1,8 +0,0 @@
-import shellscript from './shellscript.mjs'
-
-const lang = Object.freeze(JSON.parse("{\"displayName\":\"Shell Session\",\"fileTypes\":[\"sh-session\"],\"name\":\"shellsession\",\"patterns\":[{\"captures\":{\"1\":{\"name\":\"entity.other.prompt-prefix.shell-session\"},\"2\":{\"name\":\"punctuation.separator.prompt.shell-session\"},\"3\":{\"name\":\"source.shell\",\"patterns\":[{\"include\":\"source.shell\"}]}},\"match\":\"^(?:((?:\\\\(\\\\S+\\\\)\\\\s*)?(?:sh\\\\S*?|\\\\w+\\\\S+[:@]\\\\S+(?:\\\\s+\\\\S+)?|\\\\[\\\\S+?[:@]\\\\N+?].*?))\\\\s*)?([#$%>❯➜\\\\p{Greek}])\\\\s+(.*)$\"},{\"match\":\"^.+$\",\"name\":\"meta.output.shell-session\"}],\"scopeName\":\"text.shell-session\",\"embeddedLangs\":[\"shellscript\"],\"aliases\":[\"console\"]}"))
-
-export default [
-...shellscript,
-lang
-]