fix: Zinc unicode literal fixes.

Readers also use Data buffers

Author: NeedleInAJayStack

Sources/Haystack/IO/ZincReader.swift

@@ -10,13 +10,19 @@ public class ZincReader {
     var peekVal: any Val = null
     var peekLine: Int = 0
 
-    
-    public init(_ zinc: String) throws {
-        tokenizer = ZincTokenizer(zinc)
+    public init(_ data: Data) throws {
+        tokenizer = try ZincTokenizer(data)
         try consume()
         try consume()
     }
 
+    public convenience init(_ string: String) throws {
+        guard let data = string.data(using: .ascii) else {
+            throw ZincReaderError.InputIsNotUtf8
+        }
+        try self.init(data)
+    }
+    
     public func readVal() throws -> any Val {
         var val: any Val = null
         if cur == .id, curVal.equals("ver") {
@@ -298,6 +304,7 @@ enum ZincReaderError: Error {
     case GridDoesNotBeginWithVersion(any Val)
     case GridHasNoColumns
     case IdValueIsNotString(any Val)
+    case InputIsNotUtf8
     case InvalidCoord
     case InvalidRef
     case InvalidTagName