feat: add v5 wizard participation

[johnjenkins]

Pull request checklist

• Tests for the changes have been added (for bug fixes / features)
• Build (pnpm build) was run locally and passed
• Tests (pnpm test:unit and pnpm test:e2e) were run locally and passed
• Linting (pnpm lint) was run locally and passed

Pull request type

• Bugfix
• Feature
• Refactoring (no functional changes)
• Documentation
• Other (please describe):

What is the current behavior?

Issue URL:

What is the new behavior?

Wizard participation for @stencil/vitest

Implements the StencilWizardPlugin interface so that @stencil/vitest integrates with the Stencil v5 CLI wizard (stencil init / stencil generate / stencil add).

init / add hook

Interactive setup that walks the user through configuring Vitest for their project:

• Prompts for one or more named test projects (node-based or browser-based)
• For node projects: chooses DOM environment (mock-doc / jsdom / happy-dom) and load method (source via plugin, or pre-built dist)
• For browser projects: chooses provider (Playwright or WebdriverIO)
• Generates a vitest.config.ts with the appropriate workspace project blocks
• Installs required dev dependencies via nypm
• Creates vitest-setup.ts (with the correct loader import) when needed
• Writes test / test:<name> scripts into package.json
• For new projects, scaffolds a starter spec file alongside each existing component

generate hook

Integrates with stencil generate so that when a new component is created, Vitest spec files are offered

Does this introduce a breaking change?

• Yes
• No

[github-actions]

🎉 This PR is included in version 1.13.0 🎉

The release is available on:

• v1.13.0
• GitHub release

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