♻️ 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
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✅ Ready for Easypanel deployment (no root dir needed)

Migration path:
- Old structure: /dealplustech-astro/
- New structure: / (root)

dealplustech-astro/node_modules/dset/merge/index.mjs

@@ -1,26 +0,0 @@
-export function merge(a, b, k) {
-	if (typeof a === 'object' && typeof b === 'object')  {
-		if (Array.isArray(a) && Array.isArray(b)) {
-			for (k=0; k < b.length; k++) {
-				a[k] = merge(a[k], b[k]);
-			}
-		} else {
-			for (k in b) {
-				if (k === '__proto__' || k === 'constructor' || k === 'prototype') break;
-				a[k] = merge(a[k], b[k]);
-			}
-		}
-		return a;
-	}
-	return b;
-}
-
-export function dset(obj, keys, val) {
-	keys.split && (keys=keys.split('.'));
-	var i=0, l=keys.length, t=obj, x, k;
-	while (i < l) {
-		k = ''+keys[i++];
-		if (k === '__proto__' || k === 'constructor' || k === 'prototype') break;
-		t = t[k] = (i === l) ? merge(t[k],val) : (typeof(x=t[k])===typeof keys) ? x : (keys[i]*0 !== 0 || !!~(''+keys[i]).indexOf('.')) ? {} : [];
-	}
-}