Add DomainTLSMode and DomainDeleteResponse struct; update DomainClient methods

- Introduced DomainTLSMode enum for TLS policy options in DomainUpdate.
- Updated DomainUpdate to use DomainTLSMode instead of String for tls property.
- Added DomainDeleteResponse struct to handle responses from domain deletion.
- Modified update and delete methods in DomainClient to reflect new types.

Author: vamsii777

Sources/Resend/Models/Request/Domain/DomainUpdate.swift

@@ -1,9 +1,14 @@
 import Foundation
 
+public enum DomainTLSMode: String, Codable {
+    case opportunistic
+    case enforced
+}
+
 struct DomainUpdate: Encodable {
     var clickTracking: Bool
     var openTracking: Bool
-    var tls: String
+    var tls: DomainTLSMode
 
     enum CodingKeys: String, CodingKey {
         case clickTracking = "click_tracking"

Sources/Resend/Models/Response/Domain/DomainDeleteResponse.swift

@@ -0,0 +1,7 @@
+import Foundation
+
+public struct DomainDeleteResponse: Decodable {
+    public var object: String
+    public var id: String
+    public var deleted: Bool
+} 

Sources/Resend/Resend/DomainClient.swift

@@ -49,7 +49,13 @@ public class DomainClient: ResendClient {
     }
 
     /// Update a domain
-    public func update(domainId: String, clickTracking: Bool, openTracking: Bool, tls: String = "opportunistic") async throws -> Domain {
+    /// - Parameters:
+    ///   - domainId: The ID of the domain to update
+    ///   - clickTracking: Track clicks within the body of each HTML email
+    ///   - openTracking: Track the open rate of each email
+    ///   - tls: TLS policy (.opportunistic or .enforced)
+    /// - Returns: The updated Domain object
+    public func update(domainId: String, clickTracking: Bool, openTracking: Bool, tls: DomainTLSMode = .opportunistic) async throws -> Domain {
         let body = DomainUpdate(clickTracking: clickTracking, openTracking: openTracking, tls: tls)
         let response = try await httpClient.execute(
             request: .init(
@@ -77,7 +83,9 @@ public class DomainClient: ResendClient {
     }
 
     /// Delete a domain
-    public func delete(domainId: String) async throws {
+    /// - Parameter domainId: The ID of the domain to delete
+    /// - Returns: DomainDeleteResponse containing the result of the deletion
+    public func delete(domainId: String) async throws -> DomainDeleteResponse {
         let response = try await httpClient.execute(
             request: .init(
                 url: APIPath.getPath(for: .domainDelete(domainId: domainId)),
@@ -86,8 +94,6 @@ public class DomainClient: ResendClient {
             )
         ).get()
 
-        guard response.status == .ok else {
-            throw ResendError.unknownError
-        }
+        return try parseResponse(response, to: DomainDeleteResponse.self)
     }
 }