♻️ 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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✅ 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/extend/.eslintrc

@@ -1,17 +0,0 @@
-{
-	"root": true,
-
-	"extends": "@ljharb",
-
-	"rules": {
-		"complexity": [2, 20],
-		"eqeqeq": [2, "allow-null"],
-		"func-name-matching": [1],
-		"max-depth": [1, 4],
-		"max-statements": [2, 26],
-		"no-extra-parens": [1],
-		"no-magic-numbers": [0],
-		"no-restricted-syntax": [2, "BreakStatement", "ContinueStatement", "DebuggerStatement", "LabeledStatement", "WithStatement"],
-		"sort-keys": [0],
-	}
-}