fix(windows): improve CLI startup and build script compatibility

[mathiasbarea]

Summary

This PR improves Windows compatibility in two places:

1. bin/lobster.js

• uses pathToFileURL(...).href for dynamic imports so the CLI starts correctly on Windows under Node ESM

2. package.json

• replaces rm -rf dist with a Node-based cleanup command
• updates the build script to use pnpm exec tsc

Why

Before this change, Lobster failed to start correctly on Windows because the CLI entrypoint used dynamic import() with absolute filesystem paths. Under Node ESM on Windows, raw paths like C:\... are not valid module specifiers and caused:

ERR_UNSUPPORTED_ESM_URL_SCHEME

This affected multiple commands, including:

• node ./bin/lobster.js --help
• node ./bin/lobster.js doctor
• lobster run --file ...

In addition, the existing clean and build scripts were not portable to Windows shells.

Tested on Windows

• node ./bin/lobster.js --help
• node ./bin/lobster.js doctor
• lobster run --file ...

These now work correctly.

[o0WeiyuFeng0o]

I encounter the same issue and I can confirm this fix works on my computer. Hopefully this may help this PR gets merged.