Add UMD configuration for vanilla demo

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: cf16ad5db912bbb4d21a3346ce0dfe7292704626

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

| Name | Type | | ---------------- | ----- | | @neodrag/vanilla | Patch |

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[vercel[bot]]

@houtan-rocky is attempting to deploy a commit to the Purus Projects Team on Vercel.

A member of the Team first needs to authorize it.

[vercel[bot]]

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

Name	Status	Preview	Comments	Updated (UTC)
neodrag	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Apr 21, 2024 8:30am

[PuruVJ]

Looks good. A few more changes:

• Add unpkg, jsdelivr fields to package.json, so these CDNs can identify it
• Specify UMD feature in vanilla's README and in vanilla.mdx in docs

[houtan-rocky]

@PuruVJ

Done

• Add fields for unpkg and jsdelivr
• Specify UMD in vanilla's README and mdx