feat: modify nullable array to safe decoding array

Author: makinosp

Sources/VRCKit/Utils/NullableArray.swift

@@ -0,0 +1,25 @@
+//
+//  SafeDecodingArray.swift
+//
+//
+//  Created by makinosp on 2024/07/28.
+//
+
+import Foundation
+
+public struct SafeDecodingArray<Element: Codable & Hashable> {
+    public let elements: [Element]
+}
+
+extension SafeDecodingArray: Codable {
+    public init(from decoder: Decoder) throws {
+        let container = try decoder.singleValueContainer()
+        elements = (try? container.decode([Element].self)) ?? []
+    }
+}
+
+extension SafeDecodingArray: Hashable {
+    public static func == (lhs: SafeDecodingArray<Element>, rhs: SafeDecodingArray<Element>) -> Bool {
+        lhs == rhs
+    }
+}