feat: add Nuxt module for Nuxt 3+ integration

[fatihsolhan]

Summary

• Add v-onboarding/nuxt module entry point for Nuxt 3+ projects
• Auto-import VOnboardingWrapper and VOnboardingStep components (client-only for SSR safety)
• Auto-import useVOnboarding composable
• Auto-include CSS styles
• Configurable via vOnboarding config key in nuxt.config.ts

Usage

// nuxt.config.ts
export default defineNuxtConfig({
  modules: ['v-onboarding/nuxt']
})

Configuration Options

  export default defineNuxtConfig({
    modules: ['v-onboarding/nuxt'],
    vOnboarding: {
      components: true,  // Auto-import components (default: true)
      composables: true, // Auto-import useVOnboarding (default: true)
      css: true          // Include styles (default: true)
    }
  })

Test plan

• Unit tests for module configuration

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[github-actions]

🎉 This PR is included in version 2.12.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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