Saffier

Changed

- Updated [relationships](https://saffier.tarsild.io/relationships.md) document with more examples regarding
multiple foreign key declarations.

Added

- `contains` method to queryset allowing to query if a given model or reflected model exists in the
queryset.
- `related_name` is now supported on `ForeignKey` allowing transverse queries.
- Allow reverse queries using nested fields.
- `on_update` for ForeignKey and OneToOne fields
- Multiple ForeignKeys to the same table is now possible.
- [Related Name](https://saffier.tarsild.io/queries/related-name.md) document added
- Nested queries using related_name

Fixed

- Removed `nested_asyncio` causing infinite loops.

Added

- `postgresql` Typo in requirement installation.

Added

- `db_schema` - Added Registry objects of the metadata.

Fixed

- `Lifespan` event on shell returning async manager.

Changed

- Renamed `saffier-admin` to `saffier`.
- Deprecate `saffier-admin`. Now you can simply call `saffier` with the same commands
as before.

Added

- New `shell` command that allows interactive shell with saffier models.
- New `SAFFIER_SETTINGS_MODULE` allowing to create and pass specific and unique settings
to any saffier instance.
- Added support for `ipython` and `ptpython` for shell access via `saffier`.

Fixed

- Linting and formatting issues with Ruff.
- Bug with ReflectModel. A ReflectModel might not need all the fields from the database and the mapping should reflect that.
- `run_until_complete` issues fixed with `nest_asyncio`.