Implement custom radiobuttons + choicelist component

[Lionqueen94]

Description

• Refactored current styling of custom checkbox to make it easier to use (no manual div toggling needed) and to make it suitable to use with radio buttons as well. Thanks @oliver3 for the help!
• Added radio button and intermediate checkbox styling.
• Added ChoiceList component (fieldset) to group multiple inputs.

What to test

• Is the behaviour of the checkbox and radio inputs as desired
• Is the styling of the radio inputs and checkbox (still) as designed
• Is it ok that you sometimes have to click a radio button twice to check it (is this normal?) @jorisleker

[jorisleker]

Tested on MacOS (Chrome, Safari, Firefox):

• ✅ styling of radio's looks okay (all states)
• ✅ styling and behavior of checkbox is still ok. (can't retest a group of checkboxes though, because we don't have that yet)
• ❌ when hovering, the label has a hand/pointer cursor, the radio has a default cursor. Could we use pointer for both?
• ❌ padding/margin left of radio's should be removed; radio's should left align with elements above and below it
• ❌ when using tab to navigate through the page, it is now impossible to continu to the submit button from the choice group. Please compare to vanilla html form, behavior should be same. (might be fixed in Navigating form sections and focus state #305?)
• ❌ having to click a radio twice is not expected behavior. Don't know exactly when/how this happens, but it should not. Clicking a radiobutton or it's label should immediately change it's state to checked.

[Lionqueen94]

Tested on MacOS (Chrome, Safari, Firefox):

* ✅ styling of radio's looks okay (all states)

* ✅ styling and behavior of checkbox is still ok. (can't retest a group of checkboxes though, because we don't have that yet)

* ❌ when hovering, the label has a hand/pointer cursor, the radio has a default cursor. Could we use pointer for both?

* ❌ padding/margin left of radio's should be removed; radio's should left align with elements above and below it

* ❌ when using tab to navigate through the page, it is now impossible to continu to the submit button from the choice group. Please compare to vanilla html form, behavior should be same. (might be fixed in [Navigating form sections and focus state #305](https://github.com/kiesraad/abacus/issues/305)?)

* ❌ having to click a radio twice is not expected behavior. Don't know exactly when/how this happens, but it should not. Clicking a radiobutton or it's label should immediately change it's state to checked.

Fixed the cursor, padding and margin in ee2a9bb
The navigate issue should indeed be fixed by merging my other pr
Edit: Fixed double click issue in 9149666
Please retest 👼

[jorisleker]

LGTM now @Lionqueen94! Let's make sure to check the tab/navigation issue after merging this to main