Feature Request: Immobilien (Real Estate) Search Support

[boolean-nyc]

Feature Request

Problem:
Currently, whcli search only searches the general marketplace. When searching for real estate (e.g., wohnung kaufen wien), it returns marketplace items (furniture, electronics) instead of actual property listings.

Requested Feature:
Add support for willhaben.at's Immobilien (real estate) section:

• whcli immobilien search "eigentumswohnung" --location "1160 wien" --max-price 80000 --min-area 30
• Or: whcli search --type immobilien ...

Use Cases:

• Search for apartments/houses to buy (eigentumswohnung, haus)
• Search for rentals (mietwohnung)
• Filter by: location (PLZ/Bezirk), price, living area (m²), rooms, etc.

Willhaben Immobilien URL structure:

https://www.willhaben.at/iad/immobilien/eigentumswohnung/wien/wien-1160-ottakring?PRICE_TO=80000&livingArea=30

This would make the CLI much more useful for the Austrian market where willhaben is the go-to platform for real estate.

Thanks for the great tool! 🏠