[Framework] Feed list view in the Feed framework (#9)

This PR contains the work done to provide the existing `FeedViewController` view controller with real life data by integrating the `iTunesService` service into its view model. In addition, the list item cell has been design has been updated, and re-implemented using the `SwiftUI` framework.

Reviewed-on: rock-n-code/app-reviews#9
Co-authored-by: Javier Cicchelli <javier@rock-n-code.com>
Co-committed-by: Javier Cicchelli <javier@rock-n-code.com>

Libraries/iTunes/Kit/Models/Feed.swift

@@ -8,11 +8,16 @@
 
 import ReviewsFeedKit
 
-struct Feed {
+public struct Feed {
     
     // MARK: Constants
     let entries: [Review]
     
+    // MARK: Initialisers
+    public init(entries: [Review]) {
+        self.entries = entries
+    }
+    
 }
 
 // MARK: - Decodable
@@ -28,7 +33,7 @@ extension Feed: Decodable {
     }
     
     // MARK: Initialisers
-    init(from decoder: any Decoder) throws {
+    public init(from decoder: any Decoder) throws {
         let feed = try decoder.container(keyedBy: FeedKeys.self)
         let feedEntry = try feed.nestedContainer(keyedBy: EntryKeys.self, forKey: .feed)
         
@@ -41,7 +46,7 @@ extension Feed: Decodable {
 extension Feed: Encodable {
     
     // MARK: Functions
-    func encode(to encoder: any Encoder) throws {
+    public func encode(to encoder: any Encoder) throws {
         var feed = encoder.container(keyedBy: FeedKeys.self)
         var feedEntry = feed.nestedContainer(keyedBy: EntryKeys.self, forKey: .feed)