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/repositories/user_repository.py

@@ -1,62 +0,0 @@
-from models.passkey_credential import PasskeyCredential
-from models.user import User
-from sqlalchemy import Engine
-from sqlmodel import Session, select
-
-
-class UserRepository:
-    engine: Engine
-
-    def __init__(self, engine: Engine) -> None:
-        self.engine = engine
-
-    def get_user_by_email(self, email: str) -> User | None:
-        with Session(self.engine) as session:
-            statement = select(User).where(User.email == email)
-            return session.exec(statement).first()
-
-    def get_user_by_id(self, user_id: int) -> User | None:
-        with Session(self.engine) as session:
-            return session.get(User, user_id)
-
-    def create_user(self, email: str) -> User:
-        with Session(self.engine) as session:
-            user = User(email=email)  # type: ignore[call-arg]
-            session.add(user)
-            session.commit()
-            session.refresh(user)
-            return user
-
-    def get_credentials_for_user(self, user_id: int) -> list[PasskeyCredential]:
-        with Session(self.engine) as session:
-            statement = select(PasskeyCredential).where(
-                PasskeyCredential.user_id == user_id
-            )
-            return list(session.exec(statement).all())
-
-    def get_credential_by_id(self, credential_id: str) -> PasskeyCredential | None:
-        with Session(self.engine) as session:
-            statement = select(PasskeyCredential).where(
-                PasskeyCredential.credential_id == credential_id
-            )
-            return session.exec(statement).first()
-
-    def save_credential(self, credential: PasskeyCredential) -> PasskeyCredential:
-        with Session(self.engine) as session:
-            session.add(credential)
-            session.commit()
-            session.refresh(credential)
-            return credential
-
-    def update_credential_sign_count(
-        self, credential_id: str, new_sign_count: int
-    ) -> None:
-        with Session(self.engine) as session:
-            statement = select(PasskeyCredential).where(
-                PasskeyCredential.credential_id == credential_id
-            )
-            credential = session.exec(statement).first()
-            if credential:
-                credential.sign_count = new_sign_count
-                session.add(credential)
-                session.commit()