Application-settings

- Nothing yet.

- Use [`tomlkit`](https://tomlkit.readthedocs.io/en/latest/) instead of `tomli` and `tomli-w` (non-breaking)
- Rename literal `SectionTypeStr` to `ParameterKindStr` (breaking).

- pydantic.dataclasses.dataclass and pydantic.ValidationError now exported from our
namespace (Issue [36](https://github.com/StockwatchDev/application_settings/issues/36))
- Exceptions added to docstrings (Issue
[16](https://github.com/StockwatchDev/application_settings/issues/16))
- Upgraded pydantic to version 2.0, which has a different way of doing type conversion,
see the [conversion table](https://docs.pydantic.dev/2.0/usage/conversion_table/)
(Issue [75](https://github.com/StockwatchDev/application_settings/issues/75))

- Default folder name no longer just a dot if container class is called Config or
Settings.

- File path for config / settings now via `set_filepath()` and no longer as argument of
`get()`.