♻️ 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/resolveImports.js

@@ -1,24 +0,0 @@
-import { isRemotePath, removeBase } from "@astrojs/internal-helpers/path";
-import { CONTENT_IMAGE_FLAG, IMAGE_IMPORT_PREFIX } from "../../content/consts.js";
-import { shorthash } from "../../runtime/server/shorthash.js";
-import { VALID_INPUT_FORMATS } from "../consts.js";
-function imageSrcToImportId(imageSrc, filePath) {
-  imageSrc = removeBase(imageSrc, IMAGE_IMPORT_PREFIX);
-  if (isRemotePath(imageSrc)) {
-    return;
-  }
-  const ext = imageSrc.split(".").at(-1)?.toLowerCase();
-  if (!ext || !VALID_INPUT_FORMATS.includes(ext)) {
-    return;
-  }
-  const params = new URLSearchParams(CONTENT_IMAGE_FLAG);
-  if (filePath) {
-    params.set("importer", filePath);
-  }
-  return `${imageSrc}?${params.toString()}`;
-}
-const importIdToSymbolName = (importId) => `__ASTRO_IMAGE_IMPORT_${shorthash(importId)}`;
-export {
-  imageSrcToImportId,
-  importIdToSymbolName
-};