Lupin 0.2.5: native onboarding and reliable Windows updates

Lupin now opens native TUI onboarding on a fresh install, lists the provider catalogue, supports API key and OAuth setup, masks secrets, verifies credentials before saving, and moves directly into the dashboard. The README now includes a guided first-run tutorial and troubleshooting reference. On Windows, lupin update now releases daemon and watchdog package locks before npm replaces the global install, verifies process ownership, serializes lifecycle operations, restarts a previously running daemon, and bypasses a damaged global npm shim through Node's bundled npm CLI. CI is verified on Ubuntu, Windows, and the Rust TUI. Full changelog: https://github.com/Fanfulla/Lupin/blob/main/CHANGELOG.md