Split out libraries into SPM packages (#298)

Sources/Packages/Sources/SecureEnclaveSecretKit/SecureEnclaveSecret.swift

@@ -0,0 +1,17 @@
+import Foundation
+import Combine
+import SecretKit
+
+extension SecureEnclave {
+
+    public struct Secret: SecretKit.Secret {
+
+        public let id: Data
+        public let name: String
+        public let algorithm = Algorithm.ellipticCurve
+        public let keySize = 256
+        public let publicKey: Data
+
+    }
+
+}