[codex] Fix root types entry

[luuhongyii]

Summary

This fixes the root TypeScript declaration entry in package.json.

The published package/build output emits dist/index.d.mts, but the root types field currently points to ./dist/index.d.ts, which is not present in the package tarball. TypeScript consumers that read the root types field can therefore resolve a missing declaration file.

Change

• Update types from ./dist/index.d.ts to ./dist/index.d.mts.

Validation

• npm pack unplugin-vue-components@32.1.0 --dry-run --json confirmed the published tarball contains dist/index.d.mts and not dist/index.d.ts.
• corepack pnpm install --frozen-lockfile --ignore-scripts
• corepack pnpm build
• node -e "const fs=require('fs'); const p=require('./package.json'); console.log(JSON.stringify({types:p.types, typesExists:fs.existsSync(p.types)}, null, 2))"
• npm pack --dry-run --json
• corepack pnpm test --run (9 files / 36 tests passed)
• git diff --check

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commit: 17d977f