[SR-7076] Make ContiguousArray Codable

Implements Encodable and Decodable for ContiguousArray.

Author: anayini

stdlib/public/core/Codable.swift.gyb

@@ -1767,6 +1767,41 @@ extension Array : Decodable where Element : Decodable {
   }
 }
 
+extension ContiguousArray : Encodable where Element : Encodable {
+    /// Encodes the elements of this contiguous array into the given encoder
+    /// in an unkeyed container.
+    ///
+    /// This function throws an error if any values are invalid for the given
+    /// encoder's format.
+    ///
+    /// - Parameter encoder: The encoder to write data to.
+    @inlinable // FIXME(sil-serialize-all)
+    public func encode(to encoder: Encoder) throws {
+        var container = encoder.unkeyedContainer()
+        for element in self {
+            try container.encode(element)
+        }
+    }
+}
+
+extension ContiguousArray : Decodable where Element : Decodable {
+    /// Creates a new contiguous array by decoding from the given decoder.
+    ///
+    /// This initializer throws an error if reading from the decoder fails, or
+    /// if the data read is corrupted or otherwise invalid.
+    ///
+    /// - Parameter decoder: The decoder to read data from.
+    @inlinable // FIXME(sil-serialize-all)
+    public init(from decoder: Decoder) throws {
+        self.init()
+        var container = try decoder.unkeyedContainer()
+        while !container.isAtEnd {
+            let element = try container.decode(Element.self)
+            self.append(element)
+        }
+    }
+}
+
 extension Set : Encodable where Element : Encodable {
   /// Encodes the elements of this set into the given encoder in an unkeyed
   /// container.