Add File Input Output in Beef

archive/b/beef/FileInputOutput.bf

@@ -0,0 +1,49 @@
+using System;
+using System.IO;
+
+namespace FileInputOutput;
+
+class Program
+{
+    public static Result<void> WriteFile(StringView filename)
+    {
+        StreamWriter fs = scope .();
+        Try!(fs.Create(filename));
+        fs.WriteLine("Hello from Beef!");
+        fs.WriteLine("This is line 1");
+        fs.WriteLine("This is line 2");
+        fs.WriteLine("Goodbye!");
+        return .Ok;
+    }
+
+    public static Result<void> ReadFile(StringView filename)
+    {
+        StreamReader fs = scope .();
+        Try!(fs.Open(filename));
+        String line = scope .();
+        while (fs.ReadLine(line) case .Ok)
+        {
+            Console.WriteLine(line);
+            line.Clear();
+        }
+
+        return .Ok;
+    }
+
+    public static int Main(String[] args)
+    {
+        String filename = "output.txt";
+
+        if (WriteFile(filename) case .Err)
+        {
+            Console.WriteLine($"Could not write {filename}");
+        }
+
+        if (ReadFile(filename) case .Err)
+        {
+            Console.WriteLine($"Could not read {filename}");
+        }
+
+        return 0;
+    }
+}