Add new property types, catch invalid city names

[saattrupdan]

Added

• Added the ability to search for different property types, with the new
  --property-type (-t) option. The available property types are ejerlejlighed,
  andelslejlighed and house. You can specify multiple property types with, e.g.,
  bolig-ping <other-arguments> -t ejerlejlighed -t house. It defaults to
  ejerlejlighed, which is the only type that was previously supported.

Fixed

• Now catches when an invalid city name is provided, and returns a helpful error
  message. Previously, it would just print the raw traceback.

[Copilot]

Pull Request Overview

This PR introduces support for multiple property types by refactoring all references from “flat” to “home” and adding a new CLI option for property types. Key changes include:

• Renaming and updating data model and test names from Flat to Home.
• Adding the new –property-type (–t) option to filter search queries.
• Updating documentation, changelog, and email messaging to reflect the new property terminology.

Reviewed Changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
tests/test_email.py	Updated tests to use Home instead of Flat.
tests/test_data_models.py	Updated test cases and descriptions from Flat to Home.
tests/test_cache.py	Updated caching tests with Home references.
src/bolig_ping/scraper.py	Updated scraping functionality to work with Home objects.
src/bolig_ping/email.py	Updated email composition for Home listings.
src/bolig_ping/data_models.py	Refactored Flat to Home and added property_type handling.
src/bolig_ping/cli.py	Updated CLI options, including the new property type flag.
src/bolig_ping/cache.py	Updated caching logic to work with Home objects.
src/bolig_ping/init.py	Updated description for Home listings.
pyproject.toml	Updated project description to reflect Home listings.
README.md	Updated documentation from flat to home; minor typo issue.
CHANGELOG.md	Updated changelog with new property type feature.