♻️ 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/prismjs/components/prism-t4-templating.min.js

@@ -1 +0,0 @@
-!function(e){function t(e,t,a){return{pattern:RegExp("<#"+e+"[\\s\\S]*?#>"),alias:"block",inside:{delimiter:{pattern:RegExp("^<#"+e+"|#>$"),alias:"important"},content:{pattern:/[\s\S]+/,inside:t,alias:a}}}}e.languages["t4-templating"]=Object.defineProperty({},"createT4",{value:function(a){var n=e.languages[a],i="language-"+a;return{block:{pattern:/<#[\s\S]+?#>/,inside:{directive:t("@",{"attr-value":{pattern:/=(?:("|')(?:\\[\s\S]|(?!\1)[^\\])*\1|[^\s'">=]+)/,inside:{punctuation:/^=|^["']|["']$/}},keyword:/\b\w+(?=\s)/,"attr-name":/\b\w+/}),expression:t("=",n,i),"class-feature":t("\\+",n,i),standard:t("",n,i)}}}}})}(Prism);