♻️ 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/browser/wasm_exec.d.ts

@@ -1,37 +0,0 @@
-declare class Go {
-    importObject: {
-        gojs: {
-            'runtime.wasmExit': (sp: any) => void;
-            'runtime.wasmWrite': (sp: any) => void;
-            'runtime.resetMemoryDataView': (sp: any) => void;
-            'runtime.nanotime1': (sp: any) => void;
-            'runtime.walltime': (sp: any) => void;
-            'runtime.scheduleTimeoutEvent': (sp: any) => void;
-            'runtime.clearTimeoutEvent': (sp: any) => void;
-            'runtime.getRandomData': (sp: any) => void;
-            'syscall/js.finalizeRef': (sp: any) => void;
-            'syscall/js.stringVal': (sp: any) => void;
-            'syscall/js.valueGet': (sp: any) => void;
-            'syscall/js.valueSet': (sp: any) => void;
-            'syscall/js.valueDelete': (sp: any) => void;
-            'syscall/js.valueIndex': (sp: any) => void;
-            'syscall/js.valueSetIndex': (sp: any) => void;
-            'syscall/js.valueCall': (sp: any) => void;
-            'syscall/js.valueInvoke': (sp: any) => void;
-            'syscall/js.valueNew': (sp: any) => void;
-            'syscall/js.valueLength': (sp: any) => void;
-            'syscall/js.valuePrepareString': (sp: any) => void;
-            'syscall/js.valueLoadString': (sp: any) => void;
-            'syscall/js.valueInstanceOf': (sp: any) => void;
-            'syscall/js.copyBytesToGo': (sp: any) => void;
-            'syscall/js.copyBytesToJS': (sp: any) => void;
-            debug: (value: any) => void;
-        };
-    };
-    constructor();
-    run(instance: any): Promise<void>;
-    private _resume;
-    private _makeFuncWrapper;
-}
-
-export { Go as default };