fix: marimo islands (Windows-related) + doc touchups

[Haleshot]

📝 Summary

Will be improving docs for it soon (if that's alright); I believe islands based implementations (conversions, etc) can be elaborated on.

🔍 Description of Changes

• typo
• added uv.lock to root .gitignore (generated while islands trying in the repo); can remove if not needed.
• cross-env package for loading vite server.

📋 Checklist

• I have read the contributor guidelines.
• For large changes, or changes that affect the public API: this change was discussed or approved through an issue, on Discord, or the community discussions (Please provide a link if applicable).
• I have added tests for the changes made.
• I have run the code and verified that it works as expected.

📜 Reviewers

@akshayka OR @mscolnick

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Comments	Updated (UTC)
marimo-storybook	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Dec 20, 2024 4:21am

[vercel]

@Haleshot is attempting to deploy a commit to the marimo Team on Vercel.

A member of the Team first needs to authorize it.

[mscolnick]

is this from marimo.islands import MarimoIslandGenerator broken? ideally they dont need to import private paths