♻️ 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

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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/astro/dist/assets/utils/index.d.ts

@@ -1,17 +0,0 @@
-/**
- * NOTE: this is a public module exposed to the user, so all functions exposed
- * here must be documented via JsDoc and in the docs website.
- *
- * If some functions don't need to be exposed, just import the file that contains the functions.
- */
-export { isRemoteAllowed, matchHostname, matchPathname, matchPattern, matchPort, matchProtocol, type RemotePattern, } from '@astrojs/internal-helpers/remote';
-export { isESMImportedImage, isRemoteImage, resolveSrc } from './imageKind.js';
-export { imageMetadata } from './metadata.js';
-export { 
-/**
- * @deprecated
- */
-emitESMImage, emitImageMetadata, } from './node/emitAsset.js';
-export { getOrigQueryParams } from './queryParams.js';
-export { inferRemoteSize } from './remoteProbe.js';
-export { hashTransform, propsToFilename } from './transformToPath.js';