fix(daemon): skip Bun virtual entry path in detached child spawn

[dedene]

Problem

mcporter daemon start fails with "Failed to start daemon before timeout expired" when running from a Bun compiled binary (Homebrew install). The --foreground mode works fine.

The daemon launcher uses process.argv[1] as the CLI entry script when spawning the detached child process. In Node.js this is the script path, but in Bun compiled binaries it's a virtual /$bunfs/root/... path that Bun auto-injects into every spawned child. Including it explicitly duplicates it in the child's argv:

// Child sees:
process.argv = ["bun", "/$bunfs/root/mcporter", "/$bunfs/root/mcporter", "daemon", "start", "--foreground"]
//                                               ^^^^^^^^^^^^^^^^^^^^^^^^ duplicate

process.argv.slice(2) then parses the duplicate path as the CLI command instead of daemon, so the child silently fails to start.

This also affects mcporter list and mcporter call for keep-alive servers, since the DaemonClient auto-launches the daemon in the background.

Fix

Detect the /$bunfs/ prefix in resolveCliEntry() and omit it from spawn args — Bun already injects it automatically in the child.

Testing

• pnpm test — all 418 tests pass
• Compiled binary: bun run scripts/build-bun.ts then daemon start/status/stop cycle works
• Node.js: node dist/cli.js daemon start still works (no regression)

Fixes #78