moonbitlang / core / 1562

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main: 97%

Pull #2834

github

Refactor to implement to_string directly and use write_string in output

- Implement Int::to_string, Int64::to_string, UInt::to_string, and UInt64::to_string directly using buffer approach
- Simplify output functions to call to_string and use logger.write_string instead of multiple write_char calls
- Remove unused output_size_hint functions
- All 5734 tests pass with no API changes

Co-authored-by: Yu-zh <22126977+Yu-zh@users.noreply.github.com>

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