This is blocked by T419208: 🦄 Modify the existing create wiki endpoint in Platform API - if we want to start work on this task before then we could consider picking up T407364: [Timebox 8hr] Fix broken UI netlify with mock store

• Create a new KnowledgeEquityCreateWikiWizardStep card
  • Follow the design outlined in the parent task (T416907)
  • Use the copy from March 4, 2026 as the source of truth (might be different from designs).
  • A single radio button is required to be selected
    • https://v2.vuetifyjs.com/en/components/radio-buttons/
  • For the free text box, use the v-textarea component
    • https://v2.vuetifyjs.com/en/components/textareas
    • https://v2.vuetifyjs.com/en/api/v-textarea/
    • set the character limit of the text area with the counter=3000 property
    • this component is optional
    • use placeholder to set the grey default text in the textarea based on the copy
• Update the TemporalityCreateWikiWizardStep card to contain the logic about whether the next step is to submit the form or go to the KnowledgeEquityCreateWikiWizardStep card
• When the form is submitted, call the existing /wiki/create Platform API endpoint with the additional knowledgeEquityResponse field (see T419208 for details of that field)

Verification
This needs to be verified by the PM before deployment to staging or production.