vimit v0.6.3

Rust CLI + GUI release.

Highlights:

• Single native binary per platform (Windows, Linux, macOS, ARM).
• No Python, pip, venv, or runtime package dependencies.
• --demo works without a VibeMode key or network.
• --monitor with ratatui TUI: gauges, sparklines, color coding.
• --preset full|compact|mini for different terminal sizes.
• --threshold 5h=80:95,7d=90 for per-window alert thresholds.
• Robust schema tolerance for API changes.
• Desktop notifications with escalation tracking.
• Slint GUI with settings panel (build with --features gui).
• English and Russian docs, Termux/Android guide.