♻️ 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/is-docker/package.json

@@ -1,44 +0,0 @@
-{
-	"name": "is-docker",
-	"version": "3.0.0",
-	"description": "Check if the process is running inside a Docker container",
-	"license": "MIT",
-	"repository": "sindresorhus/is-docker",
-	"funding": "https://github.com/sponsors/sindresorhus",
-	"author": {
-		"name": "Sindre Sorhus",
-		"email": "sindresorhus@gmail.com",
-		"url": "https://sindresorhus.com"
-	},
-	"type": "module",
-	"exports": "./index.js",
-	"bin": "./cli.js",
-	"engines": {
-		"node": "^12.20.0 || ^14.13.1 || >=16.0.0"
-	},
-	"scripts": {
-		"test": "xo && ava && tsd"
-	},
-	"files": [
-		"index.js",
-		"index.d.ts",
-		"cli.js"
-	],
-	"keywords": [
-		"detect",
-		"docker",
-		"dockerized",
-		"container",
-		"inside",
-		"is",
-		"env",
-		"environment",
-		"process"
-	],
-	"devDependencies": {
-		"ava": "^3.15.0",
-		"sinon": "^11.1.2",
-		"tsd": "^0.17.0",
-		"xo": "^0.44.0"
-	}
-}