fix: problèmes de taille des champs + Ajout d'un playground form (#43)

| Numéro du ticket | Titre du ticket |
|------------------|-----------------|
|                  |                 |

## Description de la PR

## Modification du .env

## Check list

- [ ] Pas de régression
- [ ] TU/TI/TF rédigée
- [ ] TU/TI/TF OK
- [ ] CHANGELOG modifié

Co-authored-by: kevin <kevin@yuno.malio.fr>
Co-authored-by: matthieu <matthieu@yuno.malio.fr>
Co-authored-by: THOLOT DECHENE Matthieu <matthieu@yuno.malio.fr>
Reviewed-on: #43
Co-authored-by: tristan <tristan@yuno.malio.fr>
Co-committed-by: tristan <tristan@yuno.malio.fr>

app/components/malio/select/SelectCheckbox.test.ts

@@ -16,8 +16,6 @@ type SelectCheckboxProps = {
   hint?: string
   error?: string
   success?: string
-  minWidth?: string
-  maxWidth?: string
   textField?: string
   textValue?: string
   textLabel?: string
@@ -177,15 +175,6 @@ describe('MalioSelectCheckbox', () => {
     expect((checkboxes[0].element as HTMLInputElement).checked).toBe(false)
   })
 
-  it('applies minWidth via twMerge so it overrides w-full (parity with MalioSelect)', () => {
-    const wrapper = mount(SelectCheckboxForTest, {
-      props: {modelValue: [], options: [], minWidth: 'w-80'},
-    })
-    const root = wrapper.find('button').element.parentElement
-    expect(root?.className).toContain('w-80')
-    expect(root?.className).not.toContain('w-full')
-  })
-
   it('applies groupClass via twMerge', () => {
     const wrapper = mount(SelectCheckboxForTest, {
       props: {modelValue: [], options: [], groupClass: 'mt-4'},