Kanban-tui

- Fix crashes due to new textual major version. `app.query` -> `app.screen.query`

- Added better column management
- Added improvements to the settings tab UI including shortcuts
- Added support for arbitrary column names, also supporting emoji codes
- Added manual refresh binding, helpful when having multiple sessions open to sync between them
- Added new audit table in db
- Added new audit table log to OverView tab
- Added shortcuts to tab headers
- Fixed Bug, that allowed duplicate column names

- Fix emoji of boardname in border title

- Bug Fixes due to breaking changes with textual 2.0 release
- Emojis are now rendered with rich.text.Text.from_markup
- Disabled the type_to_search functionality to keep vim-like navigation on CategorySelector

- Fix Demo Category colors to be less bright

- Fix flicker back when clicking on `Overview`-tab when on `KanbanBoard`-tab