refactor: implement a new design for the UI #21
Description
Improvements to the UI:
- Remove icons from the header links and add an underline like tab navigation.
- Set background color of main page to a grayish color.
- Rework the script's card to have a new button Execute with the card still being clickable.
- Rework the about and settings page to fit the new design.
- Rework the add script modal and the script's settings modal.
Add script modal and script's settings:
- Both modal would be merged in a single modal with a field to toggle or not the delete button.
- the following settings would be displayed by default: name, interpreter, file selector, arguments.
- The following settings would hidden in another tab or in a collapse: administrator, notification.