Context rework

What is in this MR

This MR introduces a light rework of the context component. Design-wise, only a footer has been added to match what we have in Figma:

I've added the component in Storybook and some unit tests. I've also simplified how the boolean attributes were written for better code readability.

How to test this MR

• Run yarn run storybook in the frontend container, open http://localhost:6006 in your browser, and check the behaviors of the Context Menu stories.

• In the app, check if the following Context footers display nicely and work as expected :

  • Filters
  • Sort
  • Group By
  • Create/Edit Field
  • Kanban Create/Edit Stack
  • Data source (Application builder)

Merge Request Checklist

• changelog.md hasbeen updated if required.
• New/updated Premium/Enterprise features are separated correctly in the premium or enterprise folder
• The latest Chrome and Firefox have been used to test any new frontend features
• Documentation has been updated
• Quality Standards are met
• Performance: tables are still fast with 100k+ rows, 100+ field tables
• The redoc API pages have been updated for any REST API changes
• Our custom API docs are updated for changes to endpoints accessed via api tokens
• The UI/UX has been updated following UI Style Guide