v0.5.3 — Interactive task mode

## Highlights
- New `interactive: true` task flag for dev servers, REPLs, and file watchers
- Terminal stdin/stdout/stderr inherited; Ctrl-C handled cleanly
- Dependencies run with full caching before the foreground process starts
- `--list` and `--dry-run` label interactive tasks with [live]

See CHANGELOG.md for the full list of changes.