[Library] Feed library (#4)

This PR contains the work done to setup the library and also, the necessary protocols, model, structs, and error definitions to implement remote service clients.

Reviewed-on: rock-n-code/app-reviews#4
Co-authored-by: Javier Cicchelli <javier@rock-n-code.com>
Co-committed-by: Javier Cicchelli <javier@rock-n-code.com>

Libraries/Feed/Kit/Sources/Protocols/Service.swift

@@ -0,0 +1,21 @@
+//
+//  Service.swift
+//  ReviewsFeedKit
+//
+//  Created by Javier Cicchelli on 17/03/2024.
+//  Copyright © 2024 Röck+Cöde VoF. All rights reserved.
+//
+
+import Foundation
+
+public protocol Service {
+
+    // MARK: Properties
+    var configuration: ServiceConfiguration { get }
+    var decoder: JSONDecoder { get }
+    var session: URLSession { get }
+
+    // MARK: Functions
+    func getReviews(_ input: GetReviewsInput) async throws -> GetReviewsOutput
+    
+}