feat(router): verify service for applepay merchant registration (#2009)
Files to modify:


**lib.rs**
  Add:
    - mod: pub::verifications

**verifications.rs**
  Add:
    - struct: pub::ApplepayMerchantVerificationConfigs
    - struct: pub::ApplepayMerchantVerificationRequest
    - struct: pub::ApplepayMerchantResponse

**settings.rs**
  Add:
    - struct: pub::ApplepayMerchantConfigs

**lib.rs**
  Add:
    - mod: pub::verifications

**routes.rs**
  Add:
    - mod: pub::verification

**app.rs**
  Add:
    - function: pub::server
    - struct: pub::Verify
    - impl: impl Verify

**verification.rs**
  Add:
    - function: pub::apple_pay_merchant_registration

**utils.rs**
  Add:
    - mod: pub::verification

**verification.rs**
  Add:
    - function: pub::apple_pay_merchant_registration

**types.rs**
  Modify existing code