fix: correct rollup-plugin-copy types export

[luuhongyii]

Summary

• Point @web/rollup-plugin-copy's root export types condition to ./dist/copy.d.ts.
• Keep the existing import and require runtime entries unchanged.

Why

The published @web/rollup-plugin-copy@0.5.1 package exports root types from ./index.d.ts, but that file is not included in the npm tarball. The package-level types field already points to dist/copy.d.ts, which is included, so this aligns the conditional export with the existing published declaration file.

Validation

• node -e "const p=require('./packages/rollup-plugin-copy/package.json'); if(p.exports['.'].types!=='./dist/copy.d.ts') process.exit(1); console.log('manifest export types ok')"
• git diff --check
• Verified npm tarball evidence for @web/rollup-plugin-copy@0.5.1:
  • current exports["."].types: ./index.d.ts exists: false
  • package-level types: dist/copy.d.ts exists: true
  • proposed exports["."].types: ./dist/copy.d.ts exists: true

[changeset-bot]

🦋 Changeset detected

Latest commit: 02b7abb

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

This PR includes changesets to release 1 package

Name	Type
@web/rollup-plugin-copy	Patch

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