v1.0.0 of dart_exceptor

A lightweight, idiomatic Dart result type. Built on Dart 3 with zero dependencies. Features Trace, Ok, Err, split, map, mapError and bind. Changelog excerpt: - Initial release - Traceabstract base type - Ok— success implementation - Err— failure implementation - split— terminal handler for both outcomes - map— extract and transform success value - mapError— extract and transform error value - bind**— chain operations with type transformation**