Flatten repo structure: move crawler/ to root, remove vqa/ and immoweb/

The crawler subdirectory was the only active project. Moving it to the
repo root simplifies paths and removes the unnecessary nesting. The
vqa/ and immoweb/ directories were legacy/unused and have been removed.

Updated .drone.yml, .gitignore, .claude/ docs, and skills to reflect
the new flat structure.

frontend/vite.config.ts

@@ -0,0 +1,24 @@
+import tailwindcss from "@tailwindcss/vite";
+import react from '@vitejs/plugin-react-swc';
+import path from "path";
+import { env } from "process";
+import { defineConfig } from 'vite';
+
+// https://vite.dev/config/
+export default defineConfig({
+  plugins: [react(), tailwindcss()],
+  build: {
+    outDir: "dist"
+  },
+  resolve: {
+    alias: {
+      "@": path.resolve(__dirname, "./src"),
+    },
+  },
+  server: {
+    allowedHosts: [
+      env.DEV_HOST ?? 'localhost',
+      'wrongmove.viktorbarzin.me',
+    ],
+  }
+})