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/tsconfig.node.json

@@ -0,0 +1,27 @@
+{
+  "compilerOptions": {
+    // "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.node.tsbuildinfo",
+    "target": "ES2022",
+    "lib": [
+      "ES2023"
+    ],
+    "module": "ESNext",
+    "skipLibCheck": true,
+    /* Bundler mode */
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "verbatimModuleSyntax": true,
+    "moduleDetection": "force",
+    "noEmit": true,
+    /* Linting */
+    "strict": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    // "erasableSyntaxOnly": true,
+    "noFallthroughCasesInSwitch": true,
+    // "noUncheckedSideEffectImports": true
+  },
+  "include": [
+    "vite.config.ts"
+  ]
+}