feat(contacts): add the resolved field to contacts

[sreenara]

COMPLETES # NA

This pull request addresses

The issue of unresolved contacts not being returned by the ContactsClient to the developer. When doing a SCIM query of a list of contact IDs, it is possible that SCIM doesn't resolve all of the IDs passed to it. For instance, if you pass IDs which are not present in your webex organization, SCIM will be unable to resolve these IDs and send you back the details of the ID that's passed.
The ContactsClient must still return contacts which are unresolvable through SCIM so the developer can perform additional API queries (e.g. People/XSI) to get the information they need.

by making the following changes

1. Added a resolved field to the Contact object which indicates whether the contact was resolved or not. Developers can take action based on this field.
2. Changed resolveCloudContacts function to return the unresolved contacts as well as the resolved ones formatted accordingly
3. UT for the new code.

Change Type

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update
• Tooling change
• Internal code refactor

The following scenarios where tested

1. Get Cloud and Custom contacts in the samples page. Cloud contacts should have an unresolvable contact not present in the org, and this contact should show up in the final list on the samples page.
2. Other expected functions like creating a contact, deleting a contact, creating and deleting groups.
   Vidcast: https://app.vidcast.io/share/f76d510b-a072-4982-98fa-462d134349d3

I certified that

• I have read and followed contributing guidelines

• I discussed changes with code owners prior to submitting this pull request

• I have not skipped any automated checks

• All existing and new tests passed

• I have updated the documentation accordingly

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