refactor(frontend/table): move the feature to a vertical slice layout

[CammilleCC]

To close of the stack, I have reformatted table feature module to follow the vertical stack:

 features/table/
 ├── components/   context menu, popovers, tooltips
 ├── hooks/        the five use-* hooks
 ├── stores/       slice and selectors
 ├── types/        table.types
 ├── utils/        cells, bounds, pagination
 └── table.tsx     unchanged, still the way in

Also reorganized and fixed a couple of things, such as:

• adding getVariableTitle and getTitleByName
• avoiding rebuilding the cell index on the summary plot hook when run changes