Implement a new String.fromByte(_) static method that creates a single-byte string from an integer 0-255. Includes runtime validation for non-integer, non-numeric, negative, and out-of-range values. Adds the underlying wrenStringFromByte helper in wren_value.c and exposes it via a new DEF_PRIMITIVE in wren_core.c. Documents the method in the core string markdown and provides six test cases covering happy path and all error conditions.
Walter Schell
2049f1bfb1