Bump up promkit-widget version to v0.5.0

[ynqa]

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[Copilot]

Pull request overview

This PR upgrades the promkit-widgets dependency and introduces a new --write-to-stdout feature for jnv. The widget API migration replaces Pane/PaneFactory with StyledGraphemes/Widget, and text::State with status::State/Severity for cleaner status message creation. The --write-to-stdout flag allows piping the current JSON result to stdout on exit, with stdout redirection to /dev/tty during TUI rendering on Unix.

Changes:

• Migrates from Pane/PaneFactory/text::State APIs to StyledGraphemes/Widget/status::State APIs across all widget usage, and replaces the custom spinner implementation with the library's built-in spinner module.
• Adds --write-to-stdout CLI flag with StdoutRedirect to save/restore stdout fd, enabling piped output while keeping TUI rendering on the terminal (Unix only).
• Updates dependency versions (clap, tokio, promkit-widgets) and adds rustix for fd manipulation.

Reviewed changes

Copilot reviewed 11 out of 12 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
Cargo.toml	Updates deps, adds rustix, changes promkit-widgets to local path (needs fix)
Cargo.lock	Reflects dependency version updates
README.md	Documents --write-to-stdout usage examples
src/stdout_redirect.rs	New module for Unix stdout fd redirection during TUI
src/main.rs	Integrates --write-to-stdout flag and StdoutRedirect
src/prompt.rs	Returns Option<String> for stdout output; migrates to new widget APIs
src/processor.rs	Migrates Pane → StyledGraphemes in trait and helpers
src/processor/monitor.rs	Implements spinner::State trait for ContextMonitor
src/processor/spinner.rs	Deleted custom spinner in favor of library's spinner module
src/editor.rs	Migrates text::State → status::State for guide messages
src/search.rs	Migrates Pane → StyledGraphemes return type
src/json.rs	Migrates to status::State/StyledGraphemes for panes and messages

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