Update terminal size

[sourcefrog]

No description provided.

[Copilot]

Pull request overview

Updates terminal width detection to use the newer terminal_size API while keeping stdout/stderr width measurement platform-specific (Unix vs Windows).

Changes:

• Bump terminal_size dependency from 0.2 to 0.4.
• Refactor terminal-width logic into OS-specific modules and use terminal_size_of() with stdout/stderr handles/FDs.
• Bump crate version to 0.1.6 and add a changelog entry.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/width.rs	Routes width lookup through unix/windows modules behind appropriate cfg gates.
src/width/unix.rs	Uses terminal_size_of(stdout().as_fd()) / stderr().as_fd() to measure widths on Unix.
src/width/windows.rs	Uses terminal_size_of(stdout().as_handle()) / stderr().as_handle() to measure widths on Windows.
Cargo.toml	Bumps crate version to 0.1.6 and updates terminal_size to 0.4.
NEWS.md	Adds 0.1.6 release notes mentioning the dependency update.

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