♻️ 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/markdown-vue.mjs

@@ -1,5 +0,0 @@
-const lang = Object.freeze(JSON.parse("{\"fileTypes\":[],\"injectTo\":[\"text.html.markdown\"],\"injectionSelector\":\"L:text.html.markdown\",\"name\":\"markdown-vue\",\"patterns\":[{\"include\":\"#vue-code-block\"}],\"repository\":{\"vue-code-block\":{\"begin\":\"(^|\\\\G)(\\\\s*)(`{3,}|~{3,})\\\\s*(?i:(vue)((\\\\s+|[,:?{])[^`~]*)?$)\",\"beginCaptures\":{\"3\":{\"name\":\"punctuation.definition.markdown\"},\"4\":{\"name\":\"fenced_code.block.language.markdown\"},\"5\":{\"name\":\"fenced_code.block.language.attributes.markdown\",\"patterns\":[]}},\"end\":\"(^|\\\\G)(\\\\2|\\\\s{0,3})(\\\\3)\\\\s*$\",\"endCaptures\":{\"3\":{\"name\":\"punctuation.definition.markdown\"}},\"name\":\"markup.fenced_code.block.markdown\",\"patterns\":[{\"include\":\"text.html.vue\"}]}},\"scopeName\":\"markdown.vue.codeblock\"}"))
-
-export default [
-lang
-]