refactor(create-rslib): use Vue Test Utils in templates

[chenjiahan]

Summary

• Replace @testing-library/vue with the official @vue/test-utils package in the Vue JavaScript and TypeScript templates.
• Update the default component tests to mount and unmount Vue wrappers directly.

Related Links

• refactor(create-rstack): use Vue Test Utils in templates rstackjs/rstack-cli#269

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

[Copilot]

Pull request overview

This PR updates the create-rslib Vue (JS/TS) templates to use the official @vue/test-utils package for component testing instead of @testing-library/vue, aligning the generated starter tests with Vue’s recommended tooling.

Changes:

• Switched template component tests from render/screen (Testing Library) to mount (Vue Test Utils).
• Updated Vue template dependencies to remove @testing-library/vue.
• Adjusted template package metadata ordering (moved publishConfig placement).

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
packages/create-rslib/template-vue-ts/tests/index.test.ts	Migrates the Vue TS template test to Vue Test Utils mounting.
packages/create-rslib/template-vue-ts/package.json	Removes @testing-library/vue from devDependencies and reorders publishConfig.
packages/create-rslib/template-vue-js/tests/index.test.js	Migrates the Vue JS template test to Vue Test Utils mounting.
packages/create-rslib/template-vue-js/package.json	Removes @testing-library/vue from devDependencies and reorders publishConfig.

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