Show ceased directors and allow staff edits

We need to include ceased directors in the directors component for corrections. Staff should be able to alter information for ceased directors in the same way they can for current directors.

- [ ] add in ceased date to effective dates
- [ ] add in tabs to table to toggle between active and ceased
- [ ] show ceased badges and standard ceased styling for rows

Directors component: https://www.figma.com/design/6VCttiaobFtKqZPecb9Saj/Business-Dashboard?node-id=2850-13789&t=bPeBsGs66QkcTqJw-1

Ceased edit: https://www.figma.com/design/6VCttiaobFtKqZPecb9Saj/Business-Dashboard?node-id=3923-28551&t=bPeBsGs66QkcTqJw-1

Start with the directors component and compare its current table and edit flow with the linked Figma designs for the Directors component and ceased editing. Implement the listed active/ceased table tabs, ceased dates in effective dates, ceased badges and styling, and staff edits for ceased directors; done means each checklist item is represented in the UI.

Written by the indexing model from the issue text.