Update package.json exports for ESM-only build

[agneym]

Summary

• Remove module, unpkg, umd:main fields (no longer generating UMD/CJS bundles)
• Update main to point to dist/Playground.js (matching actual tsdown output)
• Simplify exports to types + import conditions only

Test plan

• Run pnpm build and verify dist output
• Test package import in a consuming project

🤖 Generated with Claude Code

Summary by CodeRabbit

• Chores
  • Transitioned playground package to ESM-only distribution
  • Updated module entry points and exports configuration
  • Minor version bump with fixes for version 1.0

_{✏️ Tip: You can customize this high-level summary in your review settings.}

[changeset-bot]

🦋 Changeset detected

Latest commit: fe7398c

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

This PR includes changesets to release 1 package

Name	Type
@agney/playground	Minor

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

[coderabbitai]

Caution

Review failed

The pull request is closed.

Walkthrough

The PR updates the playground package to be ESM-only by adding a changeset entry for a minor version bump and restructuring package.json to remove CommonJS, UMD, and module field exports, retaining only ESM imports and TypeScript types.

Changes

Cohort / File(s)	Summary
Changeset metadata \.changeset/tender-hornets-relate\.md	New changeset entry documenting a minor version bump for @agney/playground, noting ESM-only status, type updates, exports map simplification, and a fix for version 1.0.
Package configuration playground/package\.json	Main entry point renamed from dist/playground.js to dist/Playground.js; module, unpkg, and umd:main fields removed; exports map simplified to include only ESM import (./dist/Playground.js) and types (./dist/Playground.d.ts) entries; browser, UMD, and CommonJS variants removed.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~5 minutes

• Changes are straightforward configuration and metadata updates
• No logic modifications or code alterations
• Homogeneous pattern: consistent ESM-only restructuring across both files

Possibly related PRs

• Set up Changesets for automated releases and changelog #78 – Adds a changeset entry and release metadata that depends on the Changesets configuration workflow.

Poem

🐰 A hop toward the future, ESM-bright,
No more the bloat of UMD's might,
One path, one type, so clean and right,
The playground now is pure and light! ✨

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch fix/exports-fields

---

📜 Recent review details

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 04cc35c and fe7398c.

📒 Files selected for processing (2)

• .changeset/tender-hornets-relate.md (1 hunks)
• playground/package.json (1 hunks)

---

_{Comment @coderabbitai help to get the list of available commands and usage tips.}