Gov-uk-dashboards

- Fixed missing `__init__.py` in new formatting folder that prevented use of format_as_human_readable

- Added human readable formatting function, format_as_human_readable

- Added table_from_dataframe component, used to display dataframes as tables in the [Gov.UK Design System style](https://design-system.service.gov.uk/components/table/).

- Added [footer](https://design-system.service.gov.uk/components/footer/) and [details](https://design-system.service.gov.uk/components/details/) components from the Gov.UK design system

What's Changed
* Add id to navbar ul element by RhysJones125 in https://github.com/communitiesuk/pkg_gov_uk_dashboards/pull/12


**Full Changelog**: https://github.com/communitiesuk/pkg_gov_uk_dashboards/compare/v2.6.0...v2.7.0

- Added phase banner component for collecting feedback (https://design-system.service.gov.uk/components/phase-banner/)