Added byte as a new datatype. (0.9.3)

examples/byte_for_demo.fun

@@ -0,0 +1,31 @@
+#!/usr/bin/env fun
+
+// Byte + for-loop demonstration
+
+print("=== byte with hex literal and clamping ===")
+
+byte b = 0x1223       // 0x1223 -> 0x23 after 8-bit clamp
+print(b)              // -> 35
+b = 0xFF
+print(b)              // -> 255
+b = 0x1FF            // 0x1FF -> 0xFF after clamp
+print(b)              // -> 255
+
+print("")
+print("=== for-loop reassigning a byte variable (shows clamping near the top end) ===")
+
+byte acc = 0
+for i in range(250, 260)
+  acc = i           // will clamp at 255
+  print(acc)
+
+print("")
+print("=== dynamic vs typed ===")
+
+x = 0xAB
+print(typeof(x))     // -> "Number"
+x = "now string"     // dynamic variable can change type
+print(typeof(x))     // -> "String"
+
+// Typed byte must remain numeric (uint8):
+// b = "oops"        // Uncomment to see a runtime type error