[WIP] Update fragments

[sree-cfa]

Description of change ✍️

Updated the checkbox and radio fieldset fragments to be able to take a collection of options.

The options param are values from classes that implement InputOption. They must have a value and label/helpText are optional. This is to simplify rendering for static checkboxes and have a more centralized way of referencing these values in html rendering and PDF generation.
*Backwards compatible.

Priority 🥇

Medium - we can override locally for now

Effect on other applications using FFB 🌊

No breaking changes - this will be backwards compatible

Testing

There's a unit test showing how to use this new param. Here's an example as well (GenderOptions will have to be implements)

<th:block th:with="genderOptions=${T(org.ilgcc.app.utils.GenderOption).values()},
  <th:block th:replace="~{fragments/inputs/checkboxFieldset ::
    checkboxFieldset(inputName='childGender',
      label=#{children-ccap-info.gender-question},
      options=${genderOptions})}"/>

✅ Checklist before requesting a review

• Does the new code follow our preferred coding
  style?
• Does the code include javadocs, where necessary?
• Have tests for this feature been added / updated?
• Has the readme been updated?

[sree-cfa]

Should these be interpolated beforehand?

[sree-cfa]

I sort of think it should just based on how the other messages work - it seems like for Actions and Validations, we interpolate them before the template gets rendered.
I also think it's kind of nice that it isn't interpolated beforehand because the enums work pretty well here and it's not straightforward to use the messageSource through an enum

[sree-cfa]

I want to try this out in IL-GCC first before integrating to FFL. There's probably a better way to do this and maybe get interpolation to work easily 🤔

Holding off on merging, but feedback is welcome!