♻️ 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/plugins/treeview/prism-treeview.min.js

@@ -1 +0,0 @@
-"undefined"!=typeof Prism&&(Prism.languages.treeview={"treeview-part":{pattern:/^.+/m,inside:{"entry-line":[{pattern:/\|-- |├── /,alias:"line-h"},{pattern:/\| {3}|│ {3}/,alias:"line-v"},{pattern:/`-- |└── /,alias:"line-v-last"},{pattern:/ {4}/,alias:"line-v-gap"}],"entry-name":{pattern:/.*\S.*/,inside:{operator:/ -> /}}}}},Prism.hooks.add("wrap",(function(e){if("treeview"===e.language&&"entry-name"===e.type){var t=e.classes,n=/(^|[^\\])\/\s*$/;if(n.test(e.content))e.content=e.content.replace(n,"$1"),t.push("dir");else{e.content=e.content.replace(/(^|[^\\])[=*|]\s*$/,"$1");for(var a=e.content.toLowerCase().replace(/\s+/g,"").split(".");a.length>1;)a.shift(),t.push("ext-"+a.join("-"))}"."===e.content[0]&&t.push("dotfile")}})));