Make PIR a proper library (#8)

Author: karulont

Package.swift

@@ -28,8 +28,10 @@ let package = Package(
         // Products define the executables and libraries a package produces, making them visible to other packages.
         .library(
             name: "HomomorphicEncryption",
-            targets: ["HomomorphicEncryption",
-                      "PrivateInformationRetrieval"]),
+            targets: ["HomomorphicEncryption"]),
+        .library(
+            name: "PrivateInformationRetrieval",
+            targets: ["PrivateInformationRetrieval"]),
         .library(
             name: "HomomorphicEncryptionProtobuf",
             targets: ["HomomorphicEncryptionProtobuf"]),

README.md

@@ -9,6 +9,7 @@ Applications of Swift Homomorphic Encryption include:
 Swift Homomorphic Encryption is a collection of libraries and executables.
 For more information, refer to documentation for the libraries:
 * [HomomorphicEncryption](Sources/HomomorphicEncryption/HomomorphicEncryption.docc/HomomorphicEncryption.md)
+* [PrivateInformationRetrieval](Sources/PrivateInformationRetrieval/PrivateInformationRetrieval.docc/PrivateInformationRetrieval.md)
 * [HomomorphicEncryptionProtobuf](Sources/HomomorphicEncryptionProtobuf/HomomorphicEncryptionProtobuf.docc/HomomorphicEncryptionProtobuf.md)
 * [PrivateInformationRetrievalProtobuf](Sources/PrivateInformationRetrievalProtobuf/PrivateInformationRetrievalProtobuf.docc/PrivateInformationRetrievalProtobuf.md)
 

Sources/HomomorphicEncryption/HomomorphicEncryption.docc/HomomorphicEncryption.md

@@ -6,6 +6,7 @@ Homomorphic Encryption (HE) enables computation on encrypted data.
 Swift Homomorphic Encryption is a collection of libraries and executables implementing homomorphic encryption (HE) and applications, such as private information retrieval (PIR).
 For more information, refer to documentation for the libraries:
 * [HomomorphicEncryptionProtobuf](https://github.com/apple/swift-homomorphic-encryption/blob/main/Sources/HomomorphicEncryptionProtobuf/HomomorphicEncryptionProtobuf.docc/HomomorphicEncryptionProtobuf.md)
+* [PrivateInformationRetrieval](https://github.com/apple/swift-homomorphic-encryption/blob/main/Sources/PrivateInformationRetrieval/PrivateInformationRetrieval.docc/PrivateInformationRetrieval.md)
 * [PrivateInformationRetrievalProtobuf](https://github.com/apple/swift-homomorphic-encryption/blob/main/Sources/PrivateInformationRetrievalProtobuf/PrivateInformationRetrievalProtobuf.docc/PrivateInformationRetrievalProtobuf.md)
 
 and executables: