feat: Custom ticket field types and queries implemented.

[kidunot89]

Summary

• Implements #35
• Implements #34
• Adds TicketField Interface to schema
• Adds the following TicketField child object type
  • TicketFieldBirthdate
  • TicketFieldCheckbox
  • TicketFieldDate
  • TicketFieldDropdown
  • TicketFieldEmail
  • TicketFieldPhone
  • TicketFieldRadio
  • TicketFieldText
  • TicketFieldURL
• Adds the ticketFields field to the Product type Example Query

  {
  events {
  nodes {
    wooTickets {
      nodes {
        name
        ticketFields {
          type
          label
          description
          required
          ... on TicketFieldCheckbox {
            options
          }
          ... on TicketFieldDropdown {
            options
          }
          ... on TicketFieldEmail {
            placeholder
          }
          ... on TicketFieldPhone {
            placeholder
          }
          ... on TicketFieldRadio {
            options
          }
          ... on TicketFieldText {
            placeholder
          }
          ... on TicketFieldURL {
            placeholder
          }
        }
      }
    }
  }
  }
  }

• Adds the ticketFields field to the Event Example Query

  {
  events {
  nodes {
    ticketFields {
      type
      label
      description
      required
      ... on TicketFieldCheckbox {
        options
      }
      ... on TicketFieldDropdown {
        options
      }
      ... on TicketFieldEmail {
        placeholder
      }
      ... on TicketFieldPhone {
        placeholder
      }
      ... on TicketFieldRadio {
        options
      }
      ... on TicketFieldText {
        placeholder
      }
      ... on TicketFieldURL {
        placeholder
      }
    }
  }
  }
  }

TODO

• Add Event -> ticketFields unit test
• Add Product -> ticketFields unit test