feat: prepare Cadder 1.0.0 npm distribution

[MrMaxie]

Summary

• add the Node 24 and Nub npm distribution workspace for cadder and four native platform packages
• assemble npm packages only from verified cargo-dist release archives and stage them through npm trusted publishing without a long-lived token
• add cadder tui --start-daemon and simplify the TUI status, startup feedback, navigation, and shortcuts
• update the landing page and getting-started flow so the Cadder and upstream Caddy responsibilities are clear
• keep Windows daemon and owned Caddy launches hidden while using bounded readiness checks
• record the accepted npm and TUI startup outcomes in the 1.0.0 release story

Validation

• cargo fmt --check
• cargo clippy --workspace --all-targets -- -D warnings
• cargo test --workspace
• mise run check
• mise run coverage
• mise run dist-plan
• mise run dist-build
• Windows archive SHA-256, exact file set, and all three 1.0.0 binaries verified outside the checkout
• OpenSpec strict validation and Arcantry release consistency

Notes

• This pull request does not create a tag or publish Cadder 1.0.0.
• Upstream Caddy remains a separate installation. The npm caddy command is the Cadder shim.
• Public npm installation guidance remains gated on verification of the exact registry packages.