Updated ReceiverClaimExtensions to include a new array,
`ReceiverIdClaimTypes`, for receiver ID claim types. Added
`GetReceiverIdOfReceiver` method to retrieve and validate
receiver ID claims. Modified the exception message in
`GetEnvelopeIdOfReceiver` to use a string literal for
clarity.
Refactor `ReceiverClaimExtensions` to support multiple claim
type variations by introducing arrays for envelope ID, UUID,
and receiver signature claim types. Updated the
`GetRequiredClaimOfReceiver` method to handle multiple claim
types and provide detailed error messages when claims are
missing. Refactored methods to use the new claim type arrays
for improved flexibility and robustness.
Refactored the class name in ReceiverClaimExtensions.cs to better reflect its focus on receiver-specific claim extension methods rather than general envelope authentication. No functional changes were made.
