♻️ 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/env/runtime.js

@@ -1,32 +0,0 @@
-import { AstroError, AstroErrorData } from "../core/errors/index.js";
-import { invalidVariablesToError } from "./errors.js";
-import { getEnvFieldType, validateEnvVariable } from "./validators.js";
-let _getEnv = (key) => process.env[key];
-function setGetEnv(fn) {
-  _getEnv = fn;
-  _onSetGetEnv();
-}
-let _onSetGetEnv = () => {
-};
-function setOnSetGetEnv(fn) {
-  _onSetGetEnv = fn;
-}
-function getEnv(...args) {
-  return _getEnv(...args);
-}
-function createInvalidVariablesError(key, type, result) {
-  return new AstroError({
-    ...AstroErrorData.EnvInvalidVariables,
-    message: AstroErrorData.EnvInvalidVariables.message(
-      invalidVariablesToError([{ key, type, errors: result.errors }])
-    )
-  });
-}
-export {
-  createInvalidVariablesError,
-  getEnv,
-  getEnvFieldType,
-  setGetEnv,
-  setOnSetGetEnv,
-  validateEnvVariable
-};