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.

crawler/rec/routing.py

@@ -1,63 +0,0 @@
-import enum
-import os
-from typing import Any
-import requests
-from rec.utils import nextMonday
-from rec.exceptions import RoutingApiError
-
-ROUTES_API_URL = "https://routes.googleapis.com/directions/v2:computeRoutes"
-API_KEY_ENVIRONMENT_VARIABLE = "ROUTING_API_KEY"
-ROUTES_FIELD_MASK = (
-    "routes.distanceMeters,"
-    "routes.duration,"
-    "routes.staticDuration,"
-    "routes.legs.steps.distanceMeters,"
-    "routes.legs.steps.staticDuration,"
-    "routes.legs.steps.travelMode"
-)
-
-
-class TravelMode(enum.StrEnum):
-    TRANSIT = "TRANSIT"
-    BICYCLE = "BICYCLE"
-    WALK = "WALK"
-    DRIVE = "DRIVE"
-
-
-def transit_route(
-    origin_lat: float,
-    origin_lon: float,
-    dest_address: str,
-    travel_mode: TravelMode,
-    compute_alternative_routes: bool = True,
-) -> dict[str, Any]:
-    monday9am = nextMonday()
-
-    # must be set
-    api_key = os.environ[API_KEY_ENVIRONMENT_VARIABLE]
-
-    header = {
-        "X-Goog-Api-Key": api_key,
-        "Content-Type": "application/json",
-        "X-Goog-FieldMask": ROUTES_FIELD_MASK,
-    }
-
-    body = {
-        "origin": {
-            "location": {"latLng": {"latitude": origin_lat, "longitude": origin_lon}}
-        },
-        "destination": {
-            "address": dest_address
-        },
-        "travelMode": travel_mode.value,
-        "departureTime": monday9am.strftime("%Y-%m-%dT%H:%M:%S.%fZ"),
-        "computeAlternativeRoutes": compute_alternative_routes,
-        "languageCode": "en-US",
-        "units": "METRIC",
-    }
-
-    r = requests.post(ROUTES_API_URL, json=body, headers=header)
-    if r.status_code == 200:
-        return r.json()
-
-    raise RoutingApiError(r.status_code, r.json())