Added package initializers to the Amiibo models for testing.

Sources/AmiiboService/Public/Models/Amiibo.swift

@@ -52,7 +52,32 @@ public struct Amiibo: Sendable, Hashable {
     public let type: String
     
     // MARK: Initializers
-    
+
+    /// Initializes this model.
+    package init(
+        head: String,
+        tail: String,
+        name: String,
+        type: String,
+        series: String,
+        gameCharacter: String,
+        gameSeries: String,
+        image: String,
+        release: Release = .init(),
+        platform: Platform? = nil
+    ) {
+        self.gameCharacter = gameCharacter
+        self.gameSeries = gameSeries
+        self.head = head
+        self.image = image
+        self.name = name
+        self.platform = platform
+        self.release = release
+        self.series = series
+        self.tail = tail
+        self.type = type
+    }
+
     /// Initializes this model from a given payload.
     /// - Parameter payload: A payload that contains the values for the model.
     init(_ payload: Components.Schemas.Amiibo) {