Update lanpartydb to v0.9.0 (from v0.6.0)

Update GitHub repository URLs

Update lanpartydb to v0.6.0 (from v0.5.0)

`serialize_party()` is now provided by the library.

Update pydantic-xml to v2.11.0 (from v2.9.0)

Update pydantic to v2.7.4 (from v2.6.1)

Update lanpartydb to v0.5.0 (from v0.4.0)

Always export website URL to `links.website.url`

Depend on lanpartydb, remove local models

Introduce `Resource` model

Update requirements files

Add optional party property `attendees`

Tweak project name spelling

Add `Location.{latitude, longitude}`

Add defaults for `Location.{zip_code, street}`

Remove unnecessary explicit default for `Location.street`

Do not serialize boolean attributes with value `False`

Add `online` flag to party model

Reorder model definitions in module

Specify license in `pyproject.toml`, too

Move `project.scripts` section to align with what Rye generates