♻️ 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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✅ Ready for Easypanel deployment (no root dir needed)

Migration path:
- Old structure: /dealplustech-astro/
- New structure: / (root)

dealplustech-astro/node_modules/astro/dist/events/session.d.ts

@@ -1,26 +0,0 @@
-import type { AstroUserConfig } from '../types/public/config.js';
-interface EventPayload {
-    cliCommand: string;
-    config?: ConfigInfo;
-    configKeys?: string[];
-    flags?: string[];
-    optionalIntegrations?: number;
-}
-type ConfigInfoValue = string | boolean | string[] | undefined;
-type ConfigInfoRecord = Record<string, ConfigInfoValue>;
-type ConfigInfoBase = {
-    [alias in keyof AstroUserConfig]: ConfigInfoValue | ConfigInfoRecord;
-};
-interface ConfigInfo extends ConfigInfoBase {
-    build: ConfigInfoRecord;
-    image: ConfigInfoRecord;
-    markdown: ConfigInfoRecord;
-    experimental: ConfigInfoRecord;
-    legacy: ConfigInfoRecord;
-    vite: ConfigInfoRecord | undefined;
-}
-export declare function eventCliSession(cliCommand: string, userConfig: AstroUserConfig, flags?: Record<string, any>): {
-    eventName: string;
-    payload: EventPayload;
-}[];
-export {};