♻️ 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/@astrojs/compiler/dist/node/sync.d.ts

@@ -1,16 +0,0 @@
-import { TransformOptions, TransformResult, ParseOptions, ParseResult, ConvertToTSXOptions, TSXResult, transform as transform$1, parse as parse$1, convertToTSX as convertToTSX$1 } from '../shared/types.js';
-import '../shared/ast.js';
-import '../shared/diagnostics.js';
-
-type UnwrappedPromise<T> = T extends (...params: any) => Promise<infer Return> ? (...params: Parameters<T>) => Return : T;
-interface Service {
-    transform: UnwrappedPromise<typeof transform$1>;
-    parse: UnwrappedPromise<typeof parse$1>;
-    convertToTSX: UnwrappedPromise<typeof convertToTSX$1>;
-}
-declare const transform: (input: string, options: TransformOptions | undefined) => TransformResult;
-declare const parse: (input: string, options: ParseOptions | undefined) => ParseResult;
-declare const convertToTSX: (input: string, options: ConvertToTSXOptions | undefined) => TSXResult;
-declare function startRunningService(): Service;
-
-export { convertToTSX, parse, startRunningService, transform };