Initial QSfera import

Server/vendor/github.com/clipperhouse/displaywidth/CHANGELOG.md

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+# Changelog
+
+## [0.10.0]
+
+[Compare](https://github.com/clipperhouse/displaywidth/compare/v0.9.0...v0.10.0)
+
+### Added
+- New `ControlSequences` option to treat ECMA-48/ANSI escape sequences as zero-width. (#20)
+- `TruncateString` and `TruncateBytes` now preserve trailing ANSI escape sequences (such as SGR resets) when `ControlSequences` is true, preventing color bleed in terminal output.
+
+### Changed
+- Removed `stringish` dependency; generic type constraints are now inline `~string | []byte`.
+- Upgraded uax29 dependency to v2.6.0 for ANSI escape sequence support in the grapheme iterator.
+
+## [0.9.0]
+
+[Compare](https://github.com/clipperhouse/displaywidth/compare/v0.8.0...v0.9.0)
+
+### Changed
+- Unicode 17 support: East Asian Width and emoji data updated to Unicode 17.0.0. (#18)
+- Upgraded uax29 dependency to v2.5.0 (Unicode 17 grapheme segmentation).
+
+## [0.8.0]
+
+[Compare](https://github.com/clipperhouse/displaywidth/compare/v0.7.0...v0.8.0)
+
+### Changed
+- Performance: ASCII fast path that applies to any run of printable
+  ASCII. 2x-10x faster for ASCII text vs v0.7.0. (#16)
+- Upgraded uax29 dependency to v2.4.0 for Unicode 16 support. Text that includes
+  Indic_Conjunct_Break may segment differently (and more correctly). (#15)
+
+## [0.7.0]
+
+[Compare](https://github.com/clipperhouse/displaywidth/compare/v0.6.2...v0.7.0)
+
+### Added
+- New `TruncateString` and `TruncateBytes` methods to truncate strings to a
+  maximum display width, with optional tail (like an ellipsis). (#13)
+
+## [0.6.2]
+
+[Compare](https://github.com/clipperhouse/displaywidth/compare/v0.6.1...v0.6.2)
+
+### Changed
+- Internal: reduced property categories for simpler trie.
+
+## [0.6.1]
+
+[Compare](https://github.com/clipperhouse/displaywidth/compare/v0.6.0...v0.6.1)
+
+### Changed
+- Perf improvements: replaced the ASCII lookup table with a simple
+  function. A bit more cache-friendly. More inlining.
+- Bug fix: single regional indicators are now treated as width 2, since that
+  is what actual terminals do.
+
+## [0.6.0]
+
+[Compare](https://github.com/clipperhouse/displaywidth/compare/v0.5.0...v0.6.0)
+
+### Added
+- New `StringGraphemes` and `BytesGraphemes` methods, for iterating over the
+widths of grapheme clusters.
+
+### Changed
+- Fast ASCII lookups
+
+## [0.5.0]
+
+[Compare](https://github.com/clipperhouse/displaywidth/compare/v0.4.1...v0.5.0)
+
+### Added
+- Unicode 16 support
+- Improved emoji presentation handling per Unicode TR51
+
+### Changed
+- Corrected VS15 (U+FE0E) handling: now preserves base character width (no-op) per Unicode TR51
+- Performance optimizations: reduced property lookups
+
+### Fixed
+- VS15 variation selector now correctly preserves base character width instead of forcing width 1
+
+## [0.4.1]
+
+[Compare](https://github.com/clipperhouse/displaywidth/compare/v0.4.0...v0.4.1)
+
+### Changed
+- Updated uax29 dependency
+- Improved flag handling
+
+## [0.4.0]
+
+[Compare](https://github.com/clipperhouse/displaywidth/compare/v0.3.1...v0.4.0)
+
+### Added
+- Support for variation selectors (VS15, VS16) and regional indicator pairs (flags)
+
+## [0.3.1]
+
+[Compare](https://github.com/clipperhouse/displaywidth/compare/v0.3.0...v0.3.1)
+
+### Added
+- Fuzz testing support
+
+### Changed
+- Updated stringish dependency
+
+## [0.3.0]
+
+[Compare](https://github.com/clipperhouse/displaywidth/compare/v0.2.0...v0.3.0)
+
+### Changed
+- Dropped compatibility with go-runewidth
+- Trie implementation cleanup