[Swift] Implements FlatbuffersVector which confirms to RandomAccessCollection (#8752)

* Implements FlatbuffersVector in swift

Implements FlatbuffersVector which confirms to RandomAccessCollection,
this would give us semi-native sugary syntax to all the arrays in swift port.

This work will also be the foundation of using arrays in swift

* Fix failing tests for Swift

swift/Sources/FlatBuffers/Enum.swift

@@ -17,7 +17,7 @@
 import Foundation
 
 #if canImport(Common)
-  import Common
+import Common
 #endif
 
 /// Enum is a protocol that all flatbuffers enums should conform to
@@ -28,8 +28,13 @@ public protocol Enum {
   associatedtype T: Scalar & Verifiable
   /// Size of the current associatedtype in the enum
   static var byteSize: Int { get }
+  /// Provides a static min value in case we fail to decode
+  /// in vectors
+  static var min: Self { get }
   /// The current value the enum hosts
   var value: T { get }
+
+  init?(rawValue: T)
 }
 
 extension Enum where Self: Verifiable {
@@ -44,8 +49,8 @@ extension Enum where Self: Verifiable {
   public static func verify<T>(
     _ verifier: inout Verifier,
     at position: Int,
-    of type: T.Type
-  ) throws where T: Verifiable {
+    of type: T.Type) throws where T: Verifiable
+  {
     try verifier.inBuffer(position: position, of: type.self)
   }