♻️ 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/vite-plugin-astro-server/metadata.js

@@ -1,36 +0,0 @@
-import { viteID } from "../core/util.js";
-import { getAstroMetadata } from "../vite-plugin-astro/index.js";
-import { crawlGraph } from "./vite.js";
-async function getComponentMetadata(filePath, loader) {
-  const map = /* @__PURE__ */ new Map();
-  const rootID = viteID(filePath);
-  addMetadata(map, loader.getModuleInfo(rootID));
-  for await (const moduleNode of crawlGraph(loader, rootID, true)) {
-    const id = moduleNode.id;
-    if (id) {
-      addMetadata(map, loader.getModuleInfo(id));
-    }
-  }
-  return map;
-}
-function addMetadata(map, modInfo) {
-  if (modInfo) {
-    const astro = getAstroMetadata(modInfo);
-    if (astro) {
-      let metadata = {
-        containsHead: false,
-        propagation: "none"
-      };
-      if (astro.propagation) {
-        metadata.propagation = astro.propagation;
-      }
-      if (astro.containsHead) {
-        metadata.containsHead = astro.containsHead;
-      }
-      map.set(modInfo.id, metadata);
-    }
-  }
-}
-export {
-  getComponentMetadata
-};