[FEATURE] Add missing CustomerSegmentSelector component

[wisniewski94]

Feature request summary

AppBridge resource picker does not have "CustomerSegment" resource type so I believe this issue should be resolved in @shopify/app-bridge-react first.

Rationale

This component is listed in the docs but cannot be found anywhere in the GitHub:

<CustomerEligibilityCard
  eligibility={eligibilityField}
  selectedCustomerSegments={selectedCustomerSegmentsField}
  selectedCustomers={selectedCustomersField}
  customerSegmentSelector={
    <CustomerSegmentSelector
      selectedCustomerSegments={selectedCustomerSegmentsField}
    />
  }
  customerSelector={
    <CustomerSegmentSelector selectedCustomers={selectedCustomersField} />
  }
/>

https://github.com/Shopify/discount-app-components/tree/main/src/components/CustomerEligibilityCard

[wisniewski94]

Okay, my bad - I have found a link to the tutorial: https://shopify.dev/docs/api/discounts/components/customer-eligibility-card

Yet it deserves to be at least added to the documentation