0.1.5 — Live Reload + Auto-Update

Added: CLI checks for a newer npm version on startup (non-blocking, background check). Warns if the user is outdated.
Added: Live file watching in the TUI — board auto-reloads when task files or kandown.json change. No need to press r.
Changed: npx kandown now auto-inits .kandown/ if not found — zero manual setup required.
Fixed: TUI crashed on fresh install with Cannot find package 'react-devtools-core'.
Fixed: TUI crashed with Dynamic require of "assert" is not supported in Node.js ESM context.
Fixed: self is not defined error — added self/window polyfills and DEV=false to prevent Ink from loading react-devtools-core.
Added chokidar and signal-exit as explicit runtime dependencies.